Rashi on Genesis 20:15/רש"י על בראשית כ׳:ט״ו

1הנה ארצי לפניך BEHOLD MY LAND IS BEFORE THEE — But Pharaoh had said to him (12:19) “Behold thy wife, take her and go”, because he feared for Sarah’s safety since the Egyptians were addicted to lewd practices (see Rashi on this passage).