Deuteronomy 16:15

15 Celebrate the Feast to the Lord your God for seven days at the place he will choose, because the Lord your God will bless all your harvest and all the work you do, and you will be completely happy.

Deuteronomy 16:15 Meaning and Commentary

Deuteronomy 16:15

Seven days shalt thou keep a solemn feast unto the Lord thy
God
The feast of tabernacles still spoken of:

in the place which the Lord thy God shall choose:
the city of Jerusalem:

because the Lord thy God shall bless thee in all thy increase, and in
all the works of thine hands;
both in the increase of their fields, vineyards, and oliveyards, and also in their several handicraft trades and occupations they were employed in; so Aben Ezra interprets all the works of their hands of merchandise and manufactories:

therefore thou shalt surely rejoice;
extremely, heartily, and sincerely, and not fail to express joy on this occasion, and manifest it by a generous freewill offering to the Lord, and a bountiful entertainment for himself, his family, friends, and others.

Deuteronomy 16:15 In-Context

13 Celebrate the Feast of Shelters for seven days, after you have gathered your harvest from the threshing floor and winepress.

14 Everybody should rejoice at your Feast: you, your sons and daughters, your male and female servants, the Levites, strangers, orphans, and widows who live in your towns.

15 Celebrate the Feast to the Lord your God for seven days at the place he will choose, because the Lord your God will bless all your harvest and all the work you do, and you will be completely happy.

16 All your men must come before the Lord three times a year to the place he will choose. They must come at these times: the Feast of Unleavened Bread, the Feast of Weeks, and the Feast of Shelters. No man should come before the Lord without a gift.

17 Each of you must bring a gift that will show how much the Lord your God has blessed you.