26 Yahweh said, “If I find in Sodom fifty righteous within the city, then I will spare all the place for their sake.” 27 Abraham answered, “See now, I have taken it on myself to speak to the Lord, who am but dust and ashes. 28 What if there will lack five of the fifty righteous? Will you destroy all the city for lack of five?”
He said, “I will not destroy it, if I find forty-five there.” 29 He spoke to him yet again, and said, “What if there are forty found there?”
He said, “I will not do it for the forty’s sake.” 30 He said, “Oh don’t let the Lord be angry, and I will speak. What if there are thirty found there?”
He said, “I will not do it, if I find thirty there.” 31 He said, “See now, I have taken it on myself to speak to the Lord. What if there are twenty found there?”
He said, “I will not destroy it for the twenty’s sake.” 32 He said, “Oh don’t let the Lord be angry, and I will speak just once more. What if ten are found there?”
He said, “I will not destroy it for the ten’s sake.” 33 Yahweh went his way, as soon as he had finished communing with Abraham, and Abraham returned to his place.
Matthew Henry's Commentary on Genesis 18:26-33
Commentary on Genesis 18:23-33
(Read Genesis 18:23-33)
Here is the first solemn prayer upon record in the Bible; and it is a prayer for the sparing of Sodom. Abraham prayed earnestly that Sodom might be spared, if but a few righteous persons should be found in it. Come and learn from Abraham what compassion we should feel for sinners, and how earnestly we should pray for them. We see here that the effectual, fervent prayer of a righteous man avails much. Abraham, indeed, failed in his request for the whole place, but Lot was miraculously delivered. Be encouraged then to expect, by earnest prayer, the blessing of God upon your families, your friends, your neighbourhood. To this end you must not only pray, but you must live like Abraham. He knew the Judge of all the earth would do right. He does not plead that the wicked may be spared for their own sake, or because it would be severe to destroy them, but for the sake of the righteous who might be found among them. And righteousness only can be made a plea before God. How then did Christ make intercession for transgressors? Not by blaming the Divine law, nor by alleging aught in extenuation or excuse of human guilt; but by pleading HIS OWN obedience unto death.