Deuteronomy 16:15

You shall keep a feast to Yahweh your God seven days in the place which Yahweh shall choose; because Yahweh your God will bless you in all your increase, and in all the work of your hands, and you shall be altogether joyful.

Leviticus 23:36-42

Seven days you shall offer an offering made by fire to Yahweh. On the eighth day shall be a holy convocation to you; and you shall offer an offering made by fire to Yahweh. It is a solemn assembly; you shall do no regular work.

Numbers 29:12-38

"'On the fifteenth day of the seventh month you shall have a holy convocation; you shall do no servile work, and you shall keep a feast to Yahweh seven days:

Deuteronomy 7:13

and he will love you, and bless you, and multiply you; he will also bless the fruit of your body and the fruit of your ground, your grain and your new wine and your oil, the increase of your livestock and the young of your flock, in the land which he swore to your fathers to give you.

Deuteronomy 16:10

You shall keep the feast of weeks to Yahweh your God with a tribute of a freewill offering of your hand, which you shall give, according as Yahweh your God blesses you:

Deuteronomy 28:8-12

Yahweh will command the blessing on you in your barns, and in all that you put your hand to; and he will bless you in the land which Yahweh your God gives you.

Deuteronomy 30:16

in that I command you this day to love Yahweh your God, to walk in his ways, and to keep his commandments and his statutes and his ordinances, that you may live and multiply, and that Yahweh your God may bless you in the land where you go in to possess it.

Treasury of Scripture Knowledge

Summary

Seven days shalt thou keep a solemn feast unto the LORD thy God in the place which the LORD shall choose: because the LORD thy God shall bless thee in all thine increase, and in all the works of thine hands, therefore thou shalt surely rejoice.

General references

Bible References

Seven days

Leviticus 23:36
Seven days you shall offer an offering made by fire to Yahweh. On the eighth day shall be a holy convocation to you; and you shall offer an offering made by fire to Yahweh. It is a solemn assembly; you shall do no regular work.
Numbers 29:12
"'On the fifteenth day of the seventh month you shall have a holy convocation; you shall do no servile work, and you shall keep a feast to Yahweh seven days:

Because

Deuteronomy 16:10
You shall keep the feast of weeks to Yahweh your God with a tribute of a freewill offering of your hand, which you shall give, according as Yahweh your God blesses you:
Deuteronomy 7:13
and he will love you, and bless you, and multiply you; he will also bless the fruit of your body and the fruit of your ground, your grain and your new wine and your oil, the increase of your livestock and the young of your flock, in the land which he swore to your fathers to give you.
Deuteronomy 28:8
Yahweh will command the blessing on you in your barns, and in all that you put your hand to; and he will bless you in the land which Yahweh your God gives you.
Deuteronomy 30:16
in that I command you this day to love Yahweh your God, to walk in his ways, and to keep his commandments and his statutes and his ordinances, that you may live and multiply, and that Yahweh your God may bless you in the land where you go in to possess it.

General references

Deuteronomy 16:12
You shall remember that you were a bondservant in Egypt: and you shall observe and do these statutes.
John 7:2
Now the feast of the Jews, the Feast of Booths, was at hand.