Mark 8:12

But he sighed in spirit and said, "Why does this generation demand a Sign? I tell you truly, no Sign shall be given this generation."

Mark 7:34

and looking up to heaven with a sigh he said to him, "Ephphatha" (which means, Open).

Matthew 12:39-40

He replied to them, "It is an evil and disloyal generation that craves a Sign, but no Sign will be given to it except the Sign of the prophet Jonah;

Matthew 16:4

"It is an evil and disloyal generation that craves a Sign, and no Sign shall be given to it except the Sign of Jonah." Then he left them and went away.

Mark 3:5

Then glancing round him in anger and vexation at their obstinacy he told the man, "Stretch out your hand." He stretched it out and his hand was quite restored.

Mark 6:6

He was astonished at their lack of faith. Then he made a tour round the villages, teaching.

Mark 9:19

He answered them, "O faithless generation, how long must I still be with you? how long have I to bear with you? Bring him to me."

Luke 11:29-30

As the crowds were thronging to him, he proceeded to say, "This is an evil generation: it demands a Sign, but no Sign will be given to it except the Sign of Jonah;

Luke 16:29-31

'They have got Moses and the prophets,' said Abraham, 'they can listen to them.'

Luke 19:41

And when he saw the city, as he approached, he wept over it,

Luke 22:67-70

"Tell us if you are the Christ." He said to them, "You will not believe me if I tell you,

John 11:33-38

Now when Jesus saw her wailing and saw the Jews who accompanied her wailing, he chafed in spirit and was disquieted.

John 12:37-43

Now for all the Signs he had performed before them, they did not believe in him ??38 that the word spoken by the prophet Isaiah might be fulfilled: Lord, who has believed what they heard from us, And to whom has the arm of the Lord been revealed?

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
Then glancing round him in anger and vexation at their obstinacy he told the man, "Stretch out your hand." He stretched it out and his hand was quite restored.
Mark 7:34
and looking up to heaven with a sigh he said to him, "Ephphatha" (which means, Open).
Mark 9:19
He answered them, "O faithless generation, how long must I still be with you? how long have I to bear with you? Bring him to me."
Luke 19:41
And when he saw the city, as he approached, he wept over it,
John 11:33
Now when Jesus saw her wailing and saw the Jews who accompanied her wailing, he chafed in spirit and was disquieted.

Why

Mark 6:6
He was astonished at their lack of faith. Then he made a tour round the villages, teaching.
Luke 16:29
'They have got Moses and the prophets,' said Abraham, 'they can listen to them.'
Luke 22:67
"Tell us if you are the Christ." He said to them, "You will not believe me if I tell you,
John 12:37
Now for all the Signs he had performed before them, they did not believe in him ??38 that the word spoken by the prophet Isaiah might be fulfilled: Lord, who has believed what they heard from us, And to whom has the arm of the Lord been revealed?

There

Matthew 12:39
He replied to them, "It is an evil and disloyal generation that craves a Sign, but no Sign will be given to it except the Sign of the prophet Jonah;
Matthew 16:4
"It is an evil and disloyal generation that craves a Sign, and no Sign shall be given to it except the Sign of Jonah." Then he left them and went away.
Luke 11:29
As the crowds were thronging to him, he proceeded to say, "This is an evil generation: it demands a Sign, but no Sign will be given to it except the Sign of Jonah;

General references

Luke 11:16
Others by way of tempting him demanded he should give them a Sign from heaven.