Genesis 19:22-24

Amplified Bible

²² Hurry and take refuge there, for I cannot do anything [to punish Sodom] until you arrive there.” For this reason the town was named Zoar (few, small).

²³ The sun had risen over the earth when Lot came to Zoar. ²⁴ Then the Lord rained down brimstone (flaming sulfur) and fire on Sodom and on Gomorrah from the Lord out of heaven,