וַיְהִ֥י רָעָ֖ב בָּאָ֑רֶץ וַיֵּ֨רֶד אַבְרָ֤ם מִצְרַ֙יְמָה֙ לָג֣וּר שָׁ֔ם כִּֽי־כָבֵ֥ד הָרָעָ֖ב בָּאָֽרֶץ׃
And there was a famine in the land; and Abram went down into Egypt to sojourn there; for the famine was sore in the land.
Read halakhic rulings (Jewish law) on Genesis 12:10: and classical halakhic sources.