Son of David, have pity on us!

The Healing of Two Blind Men.
And as Jesus passed on from there, two blind men followed [him], crying out, "Son of David, have pity on us!" When he entered the house, the blind men approached him and Jesus said to them, "Do you believe that I can do this?" "Yes, Lord," they said to him. Then he touched their eyes and said, "Let it be done for you according to your faith." And their eyes were opened. Jesus warned them sternly, "See that no one knows about this." But they went out and spread word of him through all that land.
Matthew 9:27-31
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The Healing of Two Blind Man.
As they left Jericho, a great crowd followed him. Two blind men were sitting by the roadside, and when they heard that Jesus was passing by, they cried out, "[Lord,] Son of David, have pity on us!" The crowd warned them to be silent, but they called out all the more, "Lord, Son of David, have pity on us! Jesus stopped and called them and said, "What do you want me to do for you?" They answered him, "Lord, let our eyes be opened." Moved with pity, Jesus touched their eyes. Immediately they received their sight, and followed him.
Matthew 20:29-34
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The Blind Man of Bethsaida.
When they arrived at Bethsaida, they brought to him a blind man and begged him to touch him. He took the blind man by the hand and led him outside the village. Putting spittle on his eyes he laid his hands on him and asked, "Do you see anything?" Looking up he replied, "I see people looking like trees and walking." Then he laid hands on his eyes a second time and he saw clearly; his sight was restored and he could see everything distinctly. Then he sent him home and said, "Do not even go into the village."
Mark 8:22-26
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The Blind Bartimaeus
They came to Jericho. And as he was leaving Jericho with his disciples and a sizable crowd, Bartimaeus, a blind man, the son of Timaeus, sat by the roadside begging. On hearing that it was Jesus of Nazareth, he began to cry out and say, "Jesus, son of David, have pity on me." And many rebuked him, telling him to be silent. But he kept calling out all the more, "Son of David, have pity on me." Jesus stopped and said, "Call him." So they called the blind man, saying to him, "Take courage; get up, he is calling you." He threw aside his cloak, sprang up, and came to Jesus. Jesus said to him in reply, "What do you want me to do for you?" The blind man replied to him, "Master, I want to see." Jesus told him, "Go your way; your faith has save you." Immediately he received his sight and followed him on the way.
Mark 10:46-52
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The Healing of the Blind Beggar
Now as he approached Jericho a blind man was sitting by the roadside begging, and hearing a crowd going by, he inquired what was happening. They told him, "Jesus of Nazareth is passing by." He shouted, "Jesus, Son of David, have pity on me!" The people walking in front rebuked him, telling him to be silent, but he kept calling out all the more, "Son of David, have pity on me!" Then Jesus stopped and ordered tha he be brought to him; and when he came near, Jesus asked him, "What do you want me to do for you?" He replied, "Lord, please let let me see." Jesus told him, "Have sight; your faith has saved you." He immediately received his sight and followed him, giving glory to God. When they saw this, all the people gave praise to God.
Luke 18:35-43
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The Man Born Blind.
As he passed by he saw a man blind from birth. His disciples asked him, "Rabbi, who sinned, this man or his parents, that he was born blind?" Jesus answered, "Neither he nor his parents sinned; it is so that the works of God might be made visible through him. We have to do the works of the one who sent me while it is day. Night is coming when no one can work. While I am in the world, I am the light of the world." When he had said this, he spat on the ground and made clay with the saliva, and smeared the clay on his eyes, and said to him, "Go wash in the Pool of Siloam" (which means Sent). So he went and washed, and came back able to see.
His neighbors and those who had seen him earlier as a beggar said, "Isn't this the one who used to sit and beg?" Some said, "It is," but others said, "No, he just looks like him." He said, "I am." So they said to him, "[So] how were your eyes opened?" he replied, "The man called Jesus made clay and anointed my eyes and told me, 'Go to Siloam and wash. So I went there and washed and was able to see." And they said to him, "Where is he?" He said, "I don't know."
They brought the one who was once blind to the Pharisees. Now Jesus had made clay and opened his eyes on a sabbath. So then the Pharisees also asked him how he was able to see. He said to them, "He put clay on my eyes, and I washed, and now I can see." So some of the Pharisees said, "This man is not from God, because he does not keep the sabbath." [But] others said, "How can a sinful man do such signs?" And there was a division among them. So they said to the blind man again, "What do you have to say about him, since he opened your eyes?" He said, "He is a prophet."
Now the Jews did not believe that he had been blind and gained his sight until they summoned the parents of the one who had gained his sight. They asked them, "Is this your son, who you say was born blind? How does he now see?" His parents answered and said, "We know that this is our son and that he was born blind. We do not know how he sees now, nor do we know who opened his eyes. Ask him, he is of age; he can speak for himself." His parents said this because they were afraid of the Jews, for the Jews had already agreed that if anyone acknowledged him as the Messiah, he would be expelled from the synagogue. For this reason his parents said, "He is of age; question him."
So a second time they called the man who had been blind and said to him, "Give God the praise! We know that this man is a sinner." He replied, "If he is a sinner, I do not know. One thing I do know is that I was blind and now I see. So they said to him, "What did he do to you? How did he open your eyes?" He answered them, "I told you already and you did not listen. Why do you want to hear it again? Do you want to become his disciples, too?" They ridiculed him and said, "You are that man's disciples; we are disciples of Moses! We know that God spoke to Moses, but we do not know where this one is from." The man answered and said to them, "This is what is so amazing, that you do not know where he is from, yet he opened my eyes. We know that God does not listen to sinners, but if one is devout and does his will, he listens to him. It is unheard of that anyone ever opened the eyes of a person born blind. If this man were not from God, he would not be able to do anything." They answered and said to him, "You were born totally in sin, and are you trying to teach us?" Then they threw him out.
When Jesus heard that they had thrown him out, he found him and said, "Do you believe in the Son of Man?" he answered and said, "Who is he, sir, that I may believe in him?" Jesus said to him, "You have seen him and the one speaking with you is he." He said, "I do believe, Lord." and he worshiped him. Then Jesus said, "I came into this world for judgment, so that those who do not see might see, and those who do see might become blind."
Some of the Pharisees who were with him heard this and said to him, "Surely we are not also blind, are we?" Jesus said to them, "If you were blind, you would have no sin; but now you are saying, 'We see,' so your sin remains."
John 9:1-40