'Twenty' in the Bible

And he said, “Now behold, I have decided to speak to the Lord [again]. Suppose [only] twenty [righteous people] are found there?” And the Lord said, “I will not destroy it for the sake of the twenty.”

These twenty years I have been with you; your ewes and your female goats have not lost their young, nor have I eaten the rams of your flocks.

These twenty years I have been in your house; I served you fourteen years for your two daughters and six years for [my share of] your flocks, and you have changed my wages ten times.

Then as the Midianite [and Ishmaelite] traders were passing by, the brothers pulled Joseph up and lifted him out of the pit, and they sold him to the Ishmaelites for twenty shekels of silver. And so they took Joseph [as a captive] into Egypt.