Matthew 12:39

But He replied and said to them, “An evil and adulterous generation [that is morally unfaithful to God] craves and demands a [miraculous] sign; but no sign will be given to it except the sign of the prophet Jonah;

Matthew 16:4

An evil and [morally] unfaithful generation craves a [miraculous] sign; but no sign will be given to it, except the sign of [the prophet] Jonah.” Then He left them and went away.

Luke 11:29-32

Now as the crowds were increasing [in number], He began to say, “This [present] generation is a wicked generation; it seeks a sign (attesting miracle), but no sign will be given to it except the sign of Jonah [the prophet].

Isaiah 57:3

“But come here, you sons of a sorceress [raised in deception and superstition],
Offspring of an adulterer and a prostitute.

Mark 8:38

For whoever is ashamed [here and now] of Me and My words in this adulterous and sinful generation, the Son of Man will also be ashamed of him when He comes in the glory of His Father with the holy angels.”

James 4:4

You adulteresses [disloyal sinners—flirting with the world and breaking your vow to God]! Do you not know that being the world’s friend [that is, loving the things of the world] is being God’s enemy? So whoever chooses to be a friend of the world makes himself an enemy of God.

Treasury of Scripture Knowledge

Summary

Matthew 12:39

But he answered and said unto them, An evil and adulterous generation seeketh after a sign; and there shall no sign be given to it, but the sign of the prophet Jonas:

Adulterous

Isaiah 57:3

Mark 8:38

James 4:4

No sign

Matthew 16:4

Luke 11:29

General references

1 Kings 13:3

Luke 11:16

Bible References

Adulterous

“But come here, you sons of a sorceress [raised in deception and superstition],
Offspring of an adulterer and a prostitute.

No sign

An evil and [morally] unfaithful generation craves a [miraculous] sign; but no sign will be given to it, except the sign of [the prophet] Jonah.” Then He left them and went away.

General references

And he gave a sign the same day, saying, “This is the sign which the Lord has spoken: ‘Behold, the altar shall be split apart and the ashes that are on it shall be poured out.’”

Others, trying to test Him, were demanding of Him a sign from heaven.