Mark 8:12

And he was very sad in spirit, and said, Why is this generation looking for a sign? truly, I say to you, No sign will be given to this generation.

Mark 7:34

And looking up to heaven, he took a deep breath, and said to him, Ephphatha, that is, Be open.

Isaiah 53:3

Men made sport of him, turning away from him; he was a man of sorrows, marked by disease; and like one from whom men's faces are turned away, he was looked down on, and we put no value on him.

Matthew 12:39-40

But he, answering, said to them, An evil and false generation is looking for a sign; and no sign will be given to it but the sign of the prophet Jonah:

Matthew 16:4

An evil and false generation is searching after a sign; and no sign will be given to it but the sign of Jonah. And he went away from them.

Mark 3:5

And looking round on them he was angry, being sad because of their hard hearts; and he said to the man, Put out your hand. And he put it out, and his hand was made well.

Mark 6:6

And he was greatly surprised because they had no faith. And he went about the country places teaching.

Mark 9:19

And he said to them in answer, O generation without faith, how long will I have to be with you? how long will I put up with you? let him come to me.

Luke 11:29-30

And when a great number of people came together to him, he said, This generation is an evil generation: it is looking for a sign and no sign will be given to it but the sign of Jonah.

Luke 16:29-31

But Abraham said, They have Moses and the prophets; let them give ear to what they say.

Luke 19:41

And when he got near and saw the town, he was overcome with weeping for it,

Luke 22:67-70

If you are the Christ, say so. But he said, If I say so you will not have belief;

John 11:33-38

And when Jesus saw her weeping, and saw the Jews weeping who came with her, his spirit was moved and he was troubled,

John 12:37-43

But though he had done such a number of signs before them, they still had no belief in him:

Treasury of Scripture Knowledge

Summary

And he sighed deeply in his spirit, and saith, Why doth this generation seek after a sign? verily I say unto you, There shall no sign be given unto this generation.

General references

Bible References

He sighed

Mark 3:5
And looking round on them he was angry, being sad because of their hard hearts; and he said to the man, Put out your hand. And he put it out, and his hand was made well.
Mark 7:34
And looking up to heaven, he took a deep breath, and said to him, Ephphatha, that is, Be open.
Mark 9:19
And he said to them in answer, O generation without faith, how long will I have to be with you? how long will I put up with you? let him come to me.
Isaiah 53:3
Men made sport of him, turning away from him; he was a man of sorrows, marked by disease; and like one from whom men's faces are turned away, he was looked down on, and we put no value on him.
Luke 19:41
And when he got near and saw the town, he was overcome with weeping for it,
John 11:33
And when Jesus saw her weeping, and saw the Jews weeping who came with her, his spirit was moved and he was troubled,

Why

Mark 6:6
And he was greatly surprised because they had no faith. And he went about the country places teaching.
Luke 16:29
But Abraham said, They have Moses and the prophets; let them give ear to what they say.
Luke 22:67
If you are the Christ, say so. But he said, If I say so you will not have belief;
John 12:37
But though he had done such a number of signs before them, they still had no belief in him:

There

Matthew 12:39
But he, answering, said to them, An evil and false generation is looking for a sign; and no sign will be given to it but the sign of the prophet Jonah:
Matthew 16:4
An evil and false generation is searching after a sign; and no sign will be given to it but the sign of Jonah. And he went away from them.
Luke 11:29
And when a great number of people came together to him, he said, This generation is an evil generation: it is looking for a sign and no sign will be given to it but the sign of Jonah.

General references

Luke 11:16
And others, testing him, were looking for a sign from heaven from him.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain