Genesis 42:16-18

King James Version

¹⁶ Send one of you, and let him fetch your brother, and ye shall be kept in prison, that your words may be proved, whether there be any truth in you: or else by the life of Pharaoh surely ye are spies.

¹⁷ And he put them all together into ward three days.

¹⁸ And Joseph said unto them the third day, This do, and live; for I fear God: