Feast of tabernacles: compare Leviticus 23:33 ff. The offerings required at this feast were the largest of all. It was especially one of thankfulness to God for the gift of the fruits of the earth; and the quantity and the nature of the offerings (see Numbers 29:7-11) were determined accordingly.
Stress is laid on the number seven, the holy symbolic covenant number, by way of intimation that the mercies of the harvest accrued by virtue of God‘s covenant. The diminishing number of bullocks sacrificed on the preceding days of the Feast (compare Numbers 29:13, Numbers 29:17, etc.), is adjusted simply to obtain the coincidence before us on the seventh day; but some have thought that the gradual evanescence of the Law until the time of its absorption in the Gospel is here presignified in the Law itself.