Thus the Israelites who were in Jerusalem celebrated the feast of Unleavened Bread with great rejoicing for seven days, and the Levites and the priests sang the praises of the Lord day after day with all their strength.
You shall keep the festival of Unleavened Bread. For seven days at the appointed time in the month of Abib you are to eat unleavened bread, as I commanded you; for in the month of Abib you came out of Egypt.
On each of the seven days you shall offer an oblation to the Lord. Then on the seventh day you will have a declared holy day; you shall do no heavy work.
For six days you shall eat unleavened bread, and on the seventh day there shall be a solemn assembly for the Lord, your God; on that day you shall do no work. Feast of Weeks.