'Feast of Weeks' in the Bible

"You must observe the Feast of Weeks -- the firstfruits of the harvest of wheat -- and the Feast of Ingathering at the end of the year.

"'Also, on the day of the first fruits, when you bring a new grain offering to the Lord during your Feast of Weeks, you are to have a holy assembly. You must do no ordinary work.

He observed the daily requirements for sacrifices that Moses had specified for Sabbaths, new moon festivals, and the three annual celebrations -- the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Temporary Shelters.