Leviticus 23:40 And ye shall take you on the first day the boughs of goodly trees, branches of palm trees, and the boughs of thick trees, and willows of the brook; and ye shall rejoice before the Lord your God seven days.
[Patriarchs & Prophets pp 539>540] All the houses in Jerusalem were thrown open to the pilgrims, and rooms were furnished free; but this was not sufficient for the vast assembly, and tents were pitched in every available space in the city and upon the surrounding hills. On the fourteenth day of the month, at even, the Passover was celebrated, its solemn, impressive ceremonies commemorating the deliverance from bondage in Egypt, and pointing forward to the sacrifice that should deliver from the bondage of sin.
When the Savior yielded up His life on Calvary, the significance of the Passover ceased, and the ordinance of the Lord's Supper was instituted as a memorial of the same event of which the Passover had been a type. The Passover was followed by the seven day's feast of unleavened bread. The first and the seventh day were days of holy convocation, when no servile work was to be performed. On the second day of the feast, the first fruits of the year's harvest were presented before God.
Barley was the earliest grain in Palestine, and at the opening of the feast it was beginning to ripen. A sheaf of this grain was waved by the priest before the altar of God, as an acknowledgment that all was His. Not until this ceremony had been performed was the harvest to be gathered. Fifty days from the offering of first fruits, came the Pentecost, called also the feast of harvest and the feast of weeks. As an expression of gratitude for the grain prepared as food, two loaves baked with leaven were presented before God.
Deuteronomy 16:10 And thou shalt keep the feast of weeks unto the Lord thy God with a tribute of a freewill offering of thine hand, which thou shalt give unto the Lord thy God, according as the Lord thy God hath blessed thee.
May The Lord add His blessing to the study of His word. God bless!