Leviticus 23:6-8

Revised Standard Version

⁶ And on the fifteenth day of the same month is the feast of unleavened bread to the Lord; seven days you shall eat unleavened bread. ⁷ On the first day you shall have a holy convocation; you shall do no laborious work. ⁸ But you shall present an offering by fire to the Lord seven days; on the seventh day is a holy convocation; you shall do no laborious work.”