Bede

And he said of Sarah his wife, She is my sister. So Abimelech king of Gerar sent, and took her. Why Abraham said this about Sarah, and whence it should be believed that she, although taken into the king's house, was by no means touched by the king's embrace, has already been said above, where in a similar manner she was taken by Pharaoh but returned to her husband at the command of the Lord. It follows.

Commentary on Genesis (Hexaemeron) ↗