Exodus 12:15
Seven days shall you eat unleavened bread; even the first day you shall put away leaven out of your houses: for whoever eats leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Torrey's Topical Textbook—AKJV

Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread to the LORD: seven days you must eat unleavened bread.
Torrey's Topical Textbook—AKJV