In the first month, on the fourteenth day of the month at even, ye shall eat unleavened bread, until the one and twentieth day of the month at even.
Exodus 12:1
And the LORD spake unto Moses and Aaron in the land of Egypt, saying,
Exodus 12:15
Seven days shall ye eat unleavened bread; even the first day ye shall put away leaven out of your houses: for whosoever eateth leavened bread from the first day until the seventh day, that soul shall be cut off from Israel.
Leviticus 23:5
In the fourteenth day of the first month at even is the LORD'S passover.
Leviticus 23:6
And on the fifteenth day of the same month is the feast of unleavened bread unto the LORD: seven days ye must eat unleavened bread.
Numbers 28:16
And in the fourteenth day of the first month is the passover of the LORD.