Hebrews 3:17

but with whom was he displeased forty years? was it not with those that had sinned, whose carcases fell in the desert?

Acts 7:36

he it was, who delivered them by doing prodigies and miracles in the land of Egypt, in the red sea, and in the wilderness for forty years.

John 3:19-21

and this is the subject of their condemnation, that light is come into the world, and men have loved darkness rather than light, because their deeds were evil.

Acts 13:18

for forty years he maintain'd them in the wilderness.

Romans 1:28

As they did not seek the favour of God, by worshipping him, God gave them over to a depraved sense, to act unworthy of human nature;

Ephesians 4:30

grieve not the holy spirit of God, by whom you are sealed against the day of deliverance:

Hebrews 3:9-10

where your fathers provoked me to give proofs of my power forty years, tho' they saw my works.

Treasury of Scripture Knowledge

Summary

Forty years long was I grieved with this generation, and said, It is a people that do err in their heart, and they have not known my ways:

Forty

Bible References

Forty

Hebrews 3:9
where your fathers provoked me to give proofs of my power forty years, tho' they saw my works.

And they

John 3:19
and this is the subject of their condemnation, that light is come into the world, and men have loved darkness rather than light, because their deeds were evil.
Romans 1:28
As they did not seek the favour of God, by worshipping him, God gave them over to a depraved sense, to act unworthy of human nature;