Numbers 18:21

And to the children of Levi, behold, I have given all the tithes in Israel for an inheritance, for their service which they perform, the service of the tent of meeting.

Deuteronomy 14:22-29

Thou shalt truly tithe all the increase of thy seed, the produce of the field, year by year.

Nehemiah 10:37

and that we should bring the first-fruits of our coarse meal and our heave-offerings, and the fruit of all manner of trees, new wine and oil, to the priests, into the chambers of the house of our God, and the tithes of our ground to the Levites, that they, the Levites, should take the tithes in all the cities of our tillage.

Nehemiah 12:44

And at that time men were appointed over the chambers of the treasures for the heave-offerings, for the first-fruits, and for the tithes, to gather into them, out of the fields of the cities, the portions assigned by the law for the priests and the Levites; for Judah rejoiced over the priests, and over the Levites that waited.

Genesis 14:20

And blessed be the Most High God, who has delivered thine enemies into thy hand. And he gave him the tenth of all.

Leviticus 27:30-33

And as to every tithe of the land, of the seed of the land, and of the fruit of the tree, it is Jehovah's: it is holy to Jehovah.

Numbers 3:7-8

and they shall keep his charge, and the charge of the whole assembly, before the tent of meeting, to do the service of the tabernacle.

Numbers 18:6

And I, behold, I have taken your brethren, the Levites, from among the children of Israel; to you are they given as a gift for Jehovah to perform the service of the tent of meeting.

Numbers 18:24-26

for I have given for an inheritance to the Levites the tithes of the children of Israel, which they offer as a heave-offering to Jehovah; therefore I have said of them, They shall possess no inheritance among the children of Israel.

Deuteronomy 12:17-19

Thou mayest not eat within thy gates the tithe of thy corn, or of thy new wine, or of thine oil, or the firstlings of thy kine or of thy sheep, nor any of thy vows which thou vowest, nor thy voluntary-offerings, nor the heave-offering of thy hand;

2 Chronicles 31:5-6

And as soon as the commandment was published, the children of Israel gave in abundance the firstfruits of corn, new wine and oil and honey, and of all the increase of the field; and they brought in abundantly the tithe of all things.

2 Chronicles 31:12

and brought in the heave-offerings and the tithes and the dedicated things faithfully; and over these Cononiah the Levite was ruler, and Shimei his brother was second.

Nehemiah 10:29

joined with their brethren, their nobles, and entered into a curse and into an oath, to walk in the law of God, which had been given by Moses the servant of God, and to keep and do all the commandments of Jehovah our Lord, and his ordinances and his statutes;

Nehemiah 13:12

And all Judah brought the tithe of the corn and the new wine and the oil into the storehouses.

1 Corinthians 9:13-14

Do ye not know that they who labour at sacred things eat of the offerings offered in the temple; they that attend at the altar partake with the altar?

Galatians 6:6

Let him that is taught in the word communicate to him that teaches in all good things.

Hebrews 7:5

And they indeed from among the sons of Levi, who receive the priesthood, have commandment to take tithes from the people according to the law, that is from their brethren, though these are come out of the loins of Abraham:

Treasury of Scripture Knowledge

Summary

And, behold, I have given the children of Levi all the tenth in Israel for an inheritance, for their service which they serve, even the service of the tabernacle of the congregation.

Bible References

The tenth

Numbers 18:24
for I have given for an inheritance to the Levites the tithes of the children of Israel, which they offer as a heave-offering to Jehovah; therefore I have said of them, They shall possess no inheritance among the children of Israel.
Leviticus 27:30
And as to every tithe of the land, of the seed of the land, and of the fruit of the tree, it is Jehovah's: it is holy to Jehovah.
Deuteronomy 12:17
Thou mayest not eat within thy gates the tithe of thy corn, or of thy new wine, or of thine oil, or the firstlings of thy kine or of thy sheep, nor any of thy vows which thou vowest, nor thy voluntary-offerings, nor the heave-offering of thy hand;
Deuteronomy 14:22
Thou shalt truly tithe all the increase of thy seed, the produce of the field, year by year.
2 Chronicles 31:5
And as soon as the commandment was published, the children of Israel gave in abundance the firstfruits of corn, new wine and oil and honey, and of all the increase of the field; and they brought in abundantly the tithe of all things.
Nehemiah 10:29
joined with their brethren, their nobles, and entered into a curse and into an oath, to walk in the law of God, which had been given by Moses the servant of God, and to keep and do all the commandments of Jehovah our Lord, and his ordinances and his statutes;
Nehemiah 12:44
And at that time men were appointed over the chambers of the treasures for the heave-offerings, for the first-fruits, and for the tithes, to gather into them, out of the fields of the cities, the portions assigned by the law for the priests and the Levites; for Judah rejoiced over the priests, and over the Levites that waited.
Nehemiah 13:12
And all Judah brought the tithe of the corn and the new wine and the oil into the storehouses.

Even the service

Numbers 18:6
And I, behold, I have taken your brethren, the Levites, from among the children of Israel; to you are they given as a gift for Jehovah to perform the service of the tent of meeting.
Numbers 3:7
and they shall keep his charge, and the charge of the whole assembly, before the tent of meeting, to do the service of the tabernacle.
1 Corinthians 9:13
Do ye not know that they who labour at sacred things eat of the offerings offered in the temple; they that attend at the altar partake with the altar?
Galatians 6:6
Let him that is taught in the word communicate to him that teaches in all good things.

General references

Leviticus 27:30
And as to every tithe of the land, of the seed of the land, and of the fruit of the tree, it is Jehovah's: it is holy to Jehovah.
Deuteronomy 10:9
Therefore Levi has no portion nor inheritance with his brethren; Jehovah is his inheritance, according as Jehovah thy God told him.
Deuteronomy 14:22
Thou shalt truly tithe all the increase of thy seed, the produce of the field, year by year.