Deuteronomy 16:15

For seven days you will celebrate this festival dedicated to Jehovah your God in the place he will choose. You will enjoy yourselves, because Jehovah your God will bless all your harvest and all your work.

Leviticus 23:36-42

Bring a sacrifice by fire to Jehovah for seven consecutive days. On the eighth day there will be a holy assembly. Bring Jehovah a sacrifice by fire. This is the last festival of the year. Do not do any regular work.

Numbers 29:12-38

Call a holy assembly on the fifteenth day of the seventh month. You must not do any regular work. Instead, celebrate a festival to Jehovah for seven days.

Deuteronomy 7:13

He will love you, bless you, and increase the number of your descendants. He will bless you with children. He will bless your land with produce: grain, new wine, and olive oil. He will bless your herds with calves, and your flocks with lambs and kids. This will all happen in the land Jehovah will give you, as he swore to your fathers.

Deuteronomy 16:10

Then celebrate the Festival of Weeks to Jehovah your God. Bring a freewill offering in proportion to the blessings Jehovah your God has given you.

Deuteronomy 28:8-12

Jehovah will command the blessing upon you in your barns and in all that you put your hand to, and He will bless you in the land Jehovah your God gives you.

Deuteronomy 30:16

I command you today to Love Jehovah your God, follow his directions, and obey his commandments, laws, and rules. Then you will live, your population will increase, and Jehovah your God will bless you in the land that you are about to enter and possess.

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
Bring a sacrifice by fire to Jehovah for seven consecutive days. On the eighth day there will be a holy assembly. Bring Jehovah a sacrifice by fire. This is the last festival of the year. Do not do any regular work.
Numbers 29:12
Call a holy assembly on the fifteenth day of the seventh month. You must not do any regular work. Instead, celebrate a festival to Jehovah for seven days.

Because

Deuteronomy 16:10
Then celebrate the Festival of Weeks to Jehovah your God. Bring a freewill offering in proportion to the blessings Jehovah your God has given you.
Deuteronomy 7:13
He will love you, bless you, and increase the number of your descendants. He will bless you with children. He will bless your land with produce: grain, new wine, and olive oil. He will bless your herds with calves, and your flocks with lambs and kids. This will all happen in the land Jehovah will give you, as he swore to your fathers.
Deuteronomy 28:8
Jehovah will command the blessing upon you in your barns and in all that you put your hand to, and He will bless you in the land Jehovah your God gives you.
Deuteronomy 30:16
I command you today to Love Jehovah your God, follow his directions, and obey his commandments, laws, and rules. Then you will live, your population will increase, and Jehovah your God will bless you in the land that you are about to enter and possess.

General references

Deuteronomy 16:12
Remember that you were slaves in Egypt. Carefully obey these laws.
John 7:2
It was time for the Jewish Feast of Tabernacles.