וּלְשָׂרָ֣ה אָמַ֗ר הִנֵּ֨ה נָתַ֜תִּי אֶ֤לֶף כֶּ֙סֶף֙ לְאָחִ֔יךְ הִנֵּ֤ה הוּא־לָךְ֙ כְּס֣וּת עֵינַ֔יִם לְכֹ֖ל אֲשֶׁ֣ר אִתָּ֑ךְ וְאֵ֥ת כֹּ֖ל וְנֹכָֽחַת׃
사라에게 이르되 내가 은 천개를 네 오라비에게 주어서 그것으로 너와 함께 한 여러 사람 앞에서 네 수치를 풀게 하였노니 네 일이 다 선히 해결되었느니라
Rashi
ולשרה אמר AND UNTO SARAH HE SAID — Abimelech said — out of respect for her and to mollify her: “Behold I have shown you this mark of respect, viz., I have given money to your brother — to him of whom thou didst say “he is my brother”. הנה BEHOLD, this money and this evidence of respect
Chizkuni
הנה נתתי אלף כסף לאחיך, “here I have given 1000 pieces of silver to your brother;” Avimelech uses the word “your brother” sarcastically, meaning that he had given this amount of money to the person whom she had described as her brother. It was customary in those days to give expensive gifts to a bride’s brother. (Rash’bam) (We find that Eliezer had done the same to Rivkah’s brother and family.)
Da'at Zekenim
הנה נתתי אלף כסף לאחיך, “here I have given one thousand silver pieces to your brother;” The root אלף has different meanings in different contexts. For instance, in Job 33,33, ואאלפך חכמה, it means: “I will teach you wisdom.” It also appears as an expression for excessive desire, as in Genesis 31,30: כי נכסוף נכספת, where Lot acknowledges Yaakov’s great “longing to return to his father’s home after so many years of absence.” In our verse the correct interpretation is that Avimelech having given this amount of silver to Sarah’s brother Avraham who had told him that he was her brother, means that it should teach her a lesson to really love him. An alternate interpretation is that it is used as an expression for craving after material wealth as in Deuteronomy 7,13: שגר אלפיך, “the exceptional increase in your flocks and sheep, the example quoted by Rashi who says that it is a metaphor for riches, something nearly everyone is craving for. הנה לך כסות עינים, “here it shall serve you as a cover for the eyes;” Avimelech refers to the word אחיך, saying that Sarah had described her husband as her brother out of a sense of chastity. Had she referred to him as “my husband,” anyone hearing her say this would immediately have understood it as “my sexual partner.” She was too chaste to refer to anyone other than to her husband in such terms.