Genesis 18:26

And the Lord said, If there are fifty upright men in the town, I will have mercy on it because of them.

Jeremiah 5:1

Go quickly through the streets of Jerusalem, and see now, and get knowledge, and make a search in her wide places if there is a man, if there is one in her who is upright, who keeps faith; and she will have my forgiveness.

Isaiah 65:8

This is the word of the Lord: As the new wine is seen in the grapes, and they say, Do not send destruction on it, for a blessing is in it: so will I do for my servants, in order that I may not put an end to them all.

Ezekiel 22:30

And I was looking for a man among them who would make up the wall and take his station in the broken place before me for the land, so that I might not send destruction on it: but there was no one.

Isaiah 6:13

And even if there is still a tenth part in it, it will again be burned, like a tree of the woods whose broken end is still in the earth after the tree has been cut down (the holy seed is the broken end).

Isaiah 10:22

For though your people, O Israel, are as the sand of the sea, only a small number will come back: for the destruction is fixed, overflowing in righteousness.

Isaiah 19:24

In that day Israel will be the third together with Egypt and Assyria, a blessing in the earth:

Matthew 24:22

And if those days had not been made short there would have been no salvation for any, but because of the saints those days will be made short.

Treasury of Scripture Knowledge

Summary

And the LORD said, If I find in Sodom fifty righteous within the city, then I will spare all the place for their sakes.

Bible References

General references

Isaiah 6:13
And even if there is still a tenth part in it, it will again be burned, like a tree of the woods whose broken end is still in the earth after the tree has been cut down (the holy seed is the broken end).
Isaiah 10:22
For though your people, O Israel, are as the sand of the sea, only a small number will come back: for the destruction is fixed, overflowing in righteousness.
Isaiah 19:24
In that day Israel will be the third together with Egypt and Assyria, a blessing in the earth:
Isaiah 65:8
This is the word of the Lord: As the new wine is seen in the grapes, and they say, Do not send destruction on it, for a blessing is in it: so will I do for my servants, in order that I may not put an end to them all.
Jeremiah 5:1
Go quickly through the streets of Jerusalem, and see now, and get knowledge, and make a search in her wide places if there is a man, if there is one in her who is upright, who keeps faith; and she will have my forgiveness.
Ezekiel 22:30
And I was looking for a man among them who would make up the wall and take his station in the broken place before me for the land, so that I might not send destruction on it: but there was no one.
Matthew 24:22
And if those days had not been made short there would have been no salvation for any, but because of the saints those days will be made short.

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