Exodus 13:7
Unleavened bread shall be eaten seven days; and there shall no leavened bread be seen with you, neither shall there be leaven seen with you in all your quarters.
Torrey's Topical Textbook—AKJV

Deuteronomy 16:4
And there shall be no leavened bread seen with you in all your coast seven days; neither shall there any thing of the flesh, which you sacrificed the first day at even, remain all night until the morning.
Torrey's Topical Textbook—AKJV