וַאֲבִימֶ֕לֶךְ לֹ֥א קָרַ֖ב אֵלֶ֑יהָ וַיֹּאמַ֕ר אֲדֹנָ֕י הֲג֥וֹי גַּם־צַדִּ֖יק תַּהֲרֹֽג׃
Abimelech aber hatte sich ihr nicht genähert. Und er sprach: Herr, wirst Du denn auch ein unschuldig Volk töten?
Rashi on Genesis
לא קרב אליה HE HAD NOT COME NEAR HER — The Angel prevented him, as it is said (v. 6) “I have not permitted thee to touch her” (cf. Genesis Rabbah 52).
Rashbam on Genesis
ואבימלך לא קרב אליה, this conforms what G’d told him in response, that it was He, G’d, Who had prevented him from having sexual relations with her. (verse 6)
Sforno on Genesis
הגוי גם צדיק, is it fair that You would kill a nation by killing its king, especially when this king is not even guilty of a mortal offence?