וַיֹּ֣אמֶר יְהוָ֔ה זַעֲקַ֛ת סְדֹ֥ם וַעֲמֹרָ֖ה כִּי־רָ֑בָּה וְחַ֨טָּאתָ֔ם כִּ֥י כָבְדָ֖ה מְאֹֽד׃
And the LORD said: ‘Verily, the cry of Sodom and Gomorrah is great, and, verily, their sin is exceeding grievous.
Find Mishnaic references to Genesis 18:20: , passages from the 63 tractates of the Mishnah.