Comentario sobre Génesis 20:9

מעשים אשר לא יעשו THINGS THAT OUGHT NOT TO BE DONE — A plague such as does not ordinarily fall upon human beings has come upon us through you, viz, the closing up of all the secretory channels — those of semen, urine, excrement, of the ears and the nose (cf. Bava Kamma 92a).

ויאמר לו מה עשית? He said to him: "What did you do to me?" What did Avimelech mean by the word: עשית? What did Abraham do? If Avimelech referred to the evil deed, i.e. the lie, he should have prefaced his remarks by referring to the sin! Perhaps the very absence of the initial מה חטאתי לך at the beginning of his complaint is the key here. It means that the words מה עשית לנו mean: "what did you do ever do for us, and how did we repay you with ingratitude that you saw fit to treat us with such suspicions!" Avimelech hinted that there is no greater evil one can do to someone than to repay kindness with evil. Abraham's conduct had almost resulted in Avimelech's death! The entire verse is to be viewed as a rebuke.

ויקרא, he wanted to hear Avraham’s arguments and to appease him so that he would forgive him and pray on his behalf.