Leviticus 23:5-9

⁵On the fourteenth day of the first month, toward evening, is the passover-lamb to be offered unto the Lord.

⁶And on the fifteenth day of the same month is the feast of unleavened bread unto the Lord: seven days must ye eat unleavened bread.

⁷On the first day there shall be a holy convocation unto you; no servile work shall ye do thereon.

⁸And ye shall offer an offering made by fire unto the Lord seven days: on the seventh day is a holy convocation; no servile work shall ye do.

⁹And the Lord spoke unto Moses, saying,