מדרש אויף משלי 6:29

(Gen. 19:1:) THEN THE TWO ANGELS CAME TO SODOM IN THE EVENING…. Let our master instruct us: How many < methods for > executions are given over to the court?⁵⁴Tanh., Gen. 4:9. Four, and these are (according to Sanh. 7:1) STONING, BURNING, BEHEADING, AND STRANGULATION.⁵⁵See Sanh. 9:3; Sanh. 49b-50a. And which is the most severe? Our masters have said: Stoning. R. Simeon ben Johay says: Burning, because it was inflicted on a priest's daughter who had committed adultery. See how serious sexual perversion is when < it is punished > by burning. R. {Simeon} [Joshua] ben Levi said in the name of Bar Qappara: The Holy One granted atonement for everything except sexual perversion, as stated (in Prov. 6:29): NO ONE WHO TOUCHES HER WILL BE CLEANSED. R. Joshua bar Nehemiah said: The Sodomites also were liable to fire because they had erupted into sexual perversion. Thus it is stated (in Gen. 19:24): THEN THE LORD RAINED DOWN UPON SODOM AND UPON GOMORRAH BRIMSTONE AND FIRE. When they were found guilty, the Holy One said to the angels: Why are you standing about? Go and destroy them. They immediately descended and carried out the keleusis⁵⁶The word is Greek. {i.e., the command} of their Creator. Where is it shown? From what they read on the matter (Gen. 19:1): THEN THE TWO ANGELS CAME TO SODOM < IN THE EVENING >.