And thou shalt observe the feast of weeks,.... The feast of Pentecost, called the feast of weeks, because seven sabbaths or weeks, or fifty days, were to be reckoned from the day in the passover feast, on which the sheaf of the wave offering was brought, Leviticus 23:15 and which was also called the feast

of the first fruits of wheat harvest, to distinguish it from the barley harvest, at the time of the passover, when a sheaf of barley was the wave offering to the Lord; but at this two loaves or cakes of fine wheaten flour were brought as the first fruits of the wheat harvest, see Leviticus 23:17.

and the feast of ingathering at the year's end; which was the feast of tabernacles, called the feast of ingathering, because at this time all the fruits of the earth, the corn, wine, and oil, and all others were gathered in; and this was at the close of the old year, and at the beginning of the new, according to the ancient account, which made Tisri or September the first month in the year; See Gill on Exodus 23:16.

And thou shalt observe the feast of weeks, of the firstfruits of wheat harvest, and the feast of ingathering {g} at the year's end.

(g) Which was in September, when the days got shorter, that is, the end of their calendar year.

year's end: Heb. revolution of the year

34:18-27 Once a week they must rest, even in ploughing time, and in harvest. All worldly business must give way to that holy rest; even harvest work will prosper the better, for the religious observance of the sabbath day in harvest time. We must show that we prefer our communion with God, and our duty to him, before the business or the joy of harvest. Thrice a year they must appear before the Lord God, the God of Israel. Canaan was a desirable land, and the neighbouring nations were greedy; yet God says, They shall not desire it. Let us check all sinful desires against God and his glory, in our hearts, and then trust him to check all sinful desires in the hearts of others against us. The way of duty is the way of safety. Those who venture for him never lose by him. Three feasts are here mentioned: 1. The Passover, in remembrance of the deliverance out of Egypt. 2. The feast of weeks, or the feast of Pentecost; added to it is the law of the first-fruits. 3. The feast of in-gathering, or the feast of Tabernacles. Moses is to write these words, that the people might know them better. We can never be enough thankful to God for the written word. God would make a covenant with Israel, in Moses as a mediator. Thus the covenant of grace is made with believers through Christ.