Exodus 13:5-7

Young's Literal Translation

⁵ `And it hath been, when Jehovah bringeth thee in unto the land of the Canaanite, and of the Hittite, and of the Amorite, and of the Hivite, and of the Jebusite, which He hath sworn to thy fathers to give to thee, a land flowing with milk and honey, that thou hast done this service in this month.

⁶ `Seven days thou dost eat unleavened things, and in the seventh day [is] a feast to Jehovah;

⁷ unleavened things are eaten the seven days, and any thing fermented is not seen with thee; yea, leaven is not seen with thee in all thy border.