Genesis 18:24
Peradventure there be fifty righteous within the city: wilt thou also destroy and not spare the place for the fifty righteous that are therein?
Cross-reference
In Genesis 18:32, the bargaining continues — the number ten is the final attempt to find enough righteous to spare the city.
In Genesis 19:21, God spares Zoar because of this very conversation — directly fulfilling the negotiation's logic.
In Isaiah 1:9, the Lord of Hosts preserves a faithful remnant, echoing the idea that a few righteous prevent total destruction.
In Job 35:8, Elihu argues that a person's righteousness benefits other people — the same logic Abraham uses when pleading that the righteous should spare the city.
In Jeremiah 5:1, a plea to find one righteous person in Jerusalem to avert judgment mirrors this negotiation for Sodom.
In Acts 27:24, God promises Paul's companions will be saved for his sake, reflecting the principle of a righteous one securing others' safety.