Deuteronomy 16:15

15 Seven days you shall keep the festival to the Lord your God at the place that the Lord will choose; for the Lord your God will bless you in all your produce and in all your undertakings, and you shall surely celebrate.

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 You shall keep the festival of booths for seven days, when you have gathered in the produce from your threshing floor and your wine press.

14 Rejoice during your festival, you and your sons and your daughters, your male and female slaves, as well as the Levites, the strangers, the orphans, and the widows resident in your towns.

15 Seven days you shall keep the festival to the Lord your God at the place that the Lord will choose; for the Lord your God will bless you in all your produce and in all your undertakings, and you shall surely celebrate.

16 Three times a year all your males shall appear before the Lord your God at the place that he will choose: at the festival of unleavened bread, at the festival of weeks, and at the festival of booths. They shall not appear before the Lord empty-handed;

17 all shall give as they are able, according to the blessing of the Lord your God that he has given you.