Rashi on Genesis 18:21/רש"י על בראשית י״ח:כ״א

1ארדה נא I WILL GO DOWN NOW — This teaches the judges that they should not give decisions in cases involving capital punishment, except after having carefully looked into the matter — all as I have explained in the section dealing with the dispersion of the nations (11:5). Another explanation of ארדה נא is: I will go down to the very end of their doings (I will fathom the depths of their wickedness).

2הכצעקתה WHETHER ACCORDING TO THE CRY OF IT (literally, of her) — i.e. the cry of the country (מדינה which is feminine).

3הבאה אלי עשו WHETHER THEY HAVE DONE [ACCORDING TO THE CRY OF IT] WHICH IS COME UNTO ME — If they persist in their rebellious ways, (כלה) an end will I make of them; if, however, they do not persist in their rebellious ways, I shall know what I shall do — punishing them only with suffering, but I will not make an end of them. — A similar phrase we find elsewhere, (Exodus 33:5) “There- fore now put off thy ornaments from thee that I may know what to do unto thee”. — For this reason there is a separation marked by a פסיק between עשו and כלה, in order to separate in sense one word from the other. Our Teachers explained the word הכצעקתה “the cry of her”, to refer to the cry of a certain girl whom they put to death in an unnatural manner because she had given food to a poor man, as is explained in the chapter Chelek (Sanhedrin 109b).