What does the Bible say about the annual feasts in Exodus?

In Exodus 23:14-19, the Lord commanded the Israelites to observe three annual feasts. The Feast of Unleavened Bread, which includes the Passover, commemorates their deliverance from Egypt and emphasizes the importance of removing leaven, a symbol of sin. The Feast of Harvest, also known as Pentecost, celebrates the first fruits of their harvest and the giving of the Holy Spirit. Finally, the Feast of Ingathering marks the end of the harvest season and represents the final gathering of God's people at the end of time, emphasizing both thankfulness for God's provisions and the anticipation of eternal fellowship with Him.