וַיִּקַּ֨ח אֲבִימֶ֜לֶךְ צֹ֣אן וּבָקָ֗ר וַעֲבָדִים֙ וּשְׁפָחֹ֔ת וַיִּתֵּ֖ן לְאַבְרָהָ֑ם וַיָּ֣שֶׁב ל֔וֹ אֵ֖ת שָׂרָ֥ה אִשְׁתּֽוֹ׃
Abimélec choisit des pièces de menu et de gros bétail, des esclaves mâles et femelles, en fit présent à Abraham et lui restitua Sara son épouse.
Radak
Many there are which say of my soul (לנפשי): – that is, “about my soul,” as “Say concerning me (לי), He is my brother” (Gen. 20:13); “and the men of the place asked of his wife (לאשתו)” (ibid. 26:7), and such like. And the reason: because many of the wise ones of Israel, as Ahithophel and others, were of opinion that this punishment came to him on account of the affair of Bathsheba, as was actually the case; and they were thinking likewise that the kingdom would never return to him; therefore they followed Absalom and rebelled against him, and were saying that for him there was no portion in the world to come. Therefore he says of my soul. And he says:
Rashbam
ולשרה אמר, words of appeasement and consolation, explaining to her that when he had first taken her he had not employed forceful means but had treated her as if she had been a willing bride, giving her a dowry as was customary in those days for the groom to do. He had given 1000 pieces of silver to her brother, seeing that he had assumed that Avraham was no more than her brother to her as he had been led to believe. She herself had said so. This is not to be confused with the livestock which Avimelech gave Avraham at the conclusion of this story, the gifts mentioned in verse 14. The 1000 pieces of silver he had given before Sarah was taken to his palace. Even Pharaoh who had been punished more severely had made generous gifts not only to Avraham but even Lot had been enriched. (12,15). All this had been before any marriage ceremony. Avimelech clearly had been at least as generous.
Radak
ולאברם היטיב בעבורה, as soon as the king had taken Sarai he showered Avram with favours, seeing that she had described him as her brother. The favours consisted of the king sending him livestock, as well as other gifts which he could enjoy personally, so that he would give his consent to the marriage. Afterwards, when he had been punished by G’d, he did not ask Avram for forgiveness but deported him, as opposed to Avimelech (Genesis 20,14) The meaning of the words