Leviticus 23:4-6

King James Version

⁴ These are the feasts of the Lord, even holy convocations, which ye shall proclaim in their seasons.

⁵ In the fourteenth day of the first month at even is the Lord's passover.

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.