Also, or rather, surely, as this particle is oft used; for this is no addition of a new, but only a repetition of the former injunction, with a more particular explication both of the manner and reason of the feast. The fruit, not the corn, which was gathered long before, but of their trees, as vines, olives, and other fruit-trees; which completed the harvest, whence this is called the feast of ingathering, Exodus 23:16.
Related Commentaries of Leviticus 23:39
Leviticus 23:39
39 Also in the fifteenth day of the seventh month, when ye have gathered in the fruit of the land, ye shall keep a feast unto the LORD seven days: on the first day shall be a sabbath, and on the eighth day shall be a sabbath.