Mark 8:12

And he sighed deeply in his spirit, and said: Why does this generation seek for a sign? Verily I say to you, No sign will be given to this generation.

Mark 7:34

and looking up to heaven, he sighed, and said to him: Ephphatha, which means, Be opened.

Matthew 12:39-40

But he answered and said to them: A wicked and adulterous generation seeks for a sign; and no sign shall be given to it, but the sign of Jonah the prophet.

Matthew 16:4

A wicked and adulterous generation seeks for a sign: and no sign shall be given it but the sign of Jonah the prophet. And he left them and departed.

Mark 3:5

And looking around on them with anger, being grieved for the hardness of their heart, he said to the man: Stretch forth your hand; and he stretched it forth: and his hand was restored.

Mark 6:6

and he wondered at their unbelief. And he went to the villages round about, and taught.

Mark 9:19

And he answered them, and said: faithless generation! how long shall I be with you? how long shall I bear with you? Bring him to me.

Luke 11:29-30

And when the multitudes were crowded together, he began to say: This is an evil generation; it asks for a sign, and no sign shall be given to it but the sign of Jonah the prophet.

Luke 16:29-31

Abraham said to him, They have Moses and the prophets; let them hear them.

Luke 19:41

And when he came near, he looked upon the city, and wept over it,

Luke 22:67-70

If you are the Christ, tell us. But he said to them: If I tell you, you will not believe;

John 11:33-38

Then, when Jesus saw her weeping, and the Jews that came with her weeping also, he was greatly moved in spirit, and troubled;

John 12:37-43

But though he had done so many signs in their presence, yet they believed not on 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 around on them with anger, being grieved for the hardness of their heart, he said to the man: Stretch forth your hand; and he stretched it forth: and his hand was restored.
Mark 7:34
and looking up to heaven, he sighed, and said to him: Ephphatha, which means, Be opened.
Mark 9:19
And he answered them, and said: faithless generation! how long shall I be with you? how long shall I bear with you? Bring him to me.
Luke 19:41
And when he came near, he looked upon the city, and wept over it,
John 11:33
Then, when Jesus saw her weeping, and the Jews that came with her weeping also, he was greatly moved in spirit, and troubled;

Why

Mark 6:6
and he wondered at their unbelief. And he went to the villages round about, and taught.
Luke 16:29
Abraham said to him, They have Moses and the prophets; let them hear them.
Luke 22:67
If you are the Christ, tell us. But he said to them: If I tell you, you will not believe;
John 12:37
But though he had done so many signs in their presence, yet they believed not on him,

There

Matthew 12:39
But he answered and said to them: A wicked and adulterous generation seeks for a sign; and no sign shall be given to it, but the sign of Jonah the prophet.
Matthew 16:4
A wicked and adulterous generation seeks for a sign: and no sign shall be given it but the sign of Jonah the prophet. And he left them and departed.
Luke 11:29
And when the multitudes were crowded together, he began to say: This is an evil generation; it asks for a sign, and no sign shall be given to it but the sign of Jonah the prophet.

General references

Luke 11:16
And others, that they might tempt him, asked of him a sign from heaven.