26 And the Lord said, If there are fifty upright men in the town, I will have mercy on it because of them. 27 And Abraham answering said, Truly, I who am only dust, have undertaken to put my thoughts before the Lord: 28 If by chance there are five less than fifty upright men, will you give up all the town to destruction because of these five? And he said, I will not give it to destruction if there are forty-five. 29 And again he said to him, By chance there may be forty there. And he said, I will not do it if there are forty. 30 And he said, Let not the Lord be angry with me if I say, What if there are thirty there? And he said, I will not do it if there are thirty. 31 And he said, See now, I have undertaken to put my thoughts before the Lord: what if there are twenty there? And he said, I will have mercy because of the twenty. 32 And he said, O let not the Lord be angry and I will say only one word more: by chance there may be ten there. And he said, I will have mercy because of the ten. 33 And the Lord went on his way when his talk with Abraham was ended, and Abraham went back 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.