וַֽיִּשְׁאֲל֞וּ אַנְשֵׁ֤י הַמָּקוֹם֙ לְאִשְׁתּ֔וֹ וַיֹּ֖אמֶר אֲחֹ֣תִי הִ֑וא כִּ֤י יָרֵא֙ לֵאמֹ֣ר אִשְׁתִּ֔י פֶּן־יַֽהַרְגֻ֜נִי אַנְשֵׁ֤י הַמָּקוֹם֙ עַל־רִבְקָ֔ה כִּֽי־טוֹבַ֥ת מַרְאֶ֖ה הִֽיא׃
그곳 사람들이 그 아내를 물으매 그가 말하기를 그는 나의 누이라 하였으니 리브가는 보기에 아리따우므로 그곳 백성이 리브가로 인하여 자기를 죽일까 하여 그는 나의 아내라 하기를 두려워함이었더라
Rashi
לאשתו means CONCERNING HIS WIFE, just as (20:13) “Say about me (לי), He is my brother”.
Chizkuni
וישאלו אנשי המקום לאשתו, “The inhabitants of that place enquired about the marital status of the woman accompanying him.” The reason why Rivkah was not abducted immediately, as had been Sarah when Avraham had stayed in Avimelech’s country, is that Avraham had at the time warned the Philistines by saying to them at the time: “since when is the first thing you ask a stranger about the status of the people who accompany him?” Compare Talmud Baba Kamma 92.
Ramban
AND HE SAID: SHE IS MY SISTER. They did not ask concerning the children for he would say, “They are my children from another woman.”