And on the fifteenth day of the seventh month ye shall have an holy {f} convocation; ye shall do no servile work, and ye shall keep a feast unto the LORD seven days:

(f) Meaning, the feast of the tabernacles.

Wesley's Notes

29:12 Seven days - Not by abstaining so long from all servile work, but by offering extraordinary sacrifices each day. This was the Feast of Tabernacles. And all the days of their dwelling in booths, they must offer sacrifices. While we are in these tabernacles, 'tis our interest as well as duty, to keep up our communion with God. Nor will the unsettledness of our outward condition, excuse our neglect of God's worship.

Jamieson-Fausset-Brown Bible Commentary

12-34. on the fifteenth day-was to be held the feast of booths or tabernacles. (See Le 23:34, 35). The feast was to last seven days, the first and last of which were to be kept as Sabbaths, and a particular offering was prescribed for each day, the details of which are given with a minuteness suited to the infant state of the church. Two things are deserving of notice: First, that this feast was distinguished by a greater amount and variety of sacrifices than any other-partly because, occurring at the end of the year, it might be intended to supply any past deficiencies-partly because, being immediately after the ingathering of the fruits, it ought to be a liberal acknowledgment-and partly, perhaps, because God consulted the weakness of mankind, who naturally grow weary both of the charge and labor of such services when they are long-continued, and made them every day less toilsome and expensive [Patrick]. Secondly, it will be remarked that the sacrifices varied in a progressive ratio of decrease every day.

Matthew Henry's Concise Commentary

29:12-40 Soon after the day of atonement, the day in which men were to afflict their souls, followed the feast of Tabernacles, in which they were to rejoice before the Lord. Their days of rejoicing were to be days of sacrifices. A disposition to be cheerful does us good, when it encourages our hearts in the duties of God's service. All the days of dwelling in booths they must offer sacrifices; while we are here in a tabernacle state, it is our interest, as well as our duty, constantly to keep up communion with God. The sacrifices for each of the seven days are appointed. Every day there must be a sin-offering, as in the other feasts. Our burnt-offerings of praise cannot be accepted of God, unless we have an interest in the great sacrifice which Christ offered, when he made himself a Sin-offering for us. And no extraordinary services should put aside stated devotions. Every thing here reminds us of our sinfulness. The life that we live in the flesh must be by the faith of the Son of God; until we go to be with him, to behold his glory, and praise his mercy, who hath loved us and washed us from our sins in his own blood. To whom be honour and glory for ever. Amen.