Matthew Poole and continuators on Genesis 18:32

32 And he said, Oh, let, not the LORD be angry. and I will speak yet but this once : Peradventure ten shall be found there: And he said, I will not destroy it for tens sake.

Abraham in modesty could proceed no further, and being a good man himself he had a charitable opinion of others, and thought there certainly were so many good men in all those Cities, especially including Lot and his Family. No doubt Abraham remembered Lot in his Prayers, but that large and generous soul could not content himself with Lots preservation but aims at the saving of the whole Cities, which when he saw was doubtful and unlikely, he prayed for his deliverance out of that common destruction, as may be gathered from Gen. 19. 29.

Marginal references: Judg. 6. 39.