2 Chronicles 31:4

And he saith to the people, to the inhabitants of Jerusalem, to give the portion of the priests, and of the Levites, so that they are strengthened in the law of Jehovah;

Malachi 2:7

For the lips of a priest preserve knowledge, And law they do seek from his mouth, For a messenger of Jehovah of Hosts he is.

Numbers 18:8-21

And Jehovah speaketh unto Aaron: 'And I, lo, I have given to thee the charge of My heave-offerings, of all the hallowed things of the sons of Israel -- to thee I have given them for the anointing, and to thy sons, by a statute age-during.

Leviticus 27:30-33

And all tithe of the land, of the seed of the land, of the fruit of the tree, is Jehovah's -- holy to Jehovah.

Numbers 18:26-28

'And unto the Levites thou dost speak; and thou hast said unto them, When ye take from the sons of Israel the tithe which I have given to you from them, for your inheritance, then ye have lifted up from it the heave-offering of Jehovah, a tithe of the tithe;

2 Chronicles 31:16

apart from their genealogy, to males from a son of three years and upward, to every one who hath gone in to the house of Jehovah, by the matter of a day in its day, for their service in their charges, according to their courses;

Nehemiah 13:10-13

And I know that the portions of the Levites have not been given, and they flee each to his field -- the Levites and the singers, doing the work.

Malachi 3:8-10

Doth man deceive God? but ye are deceiving Me, And ye have said: 'In what have we deceived Thee?' The tithe and the heave-offering!

1 Corinthians 9:9-14

for in the law of Moses it hath been written, 'thou shalt not muzzle an ox treading out corn;' for the oxen doth God care?

Galatians 6:6

And let him who is instructed in the word share with him who is instructing -- in all good things.

Treasury of Scripture Knowledge

Summary

Moreover he commanded the people that dwelt in Jerusalem to give the portion of the priests and the Levites, that they might be encouraged in the law of the LORD.

General references

Bible References

The portion

2 Chronicles 31:16
apart from their genealogy, to males from a son of three years and upward, to every one who hath gone in to the house of Jehovah, by the matter of a day in its day, for their service in their charges, according to their courses;
Leviticus 27:30
And all tithe of the land, of the seed of the land, of the fruit of the tree, is Jehovah's -- holy to Jehovah.
Numbers 18:8
And Jehovah speaketh unto Aaron: 'And I, lo, I have given to thee the charge of My heave-offerings, of all the hallowed things of the sons of Israel -- to thee I have given them for the anointing, and to thy sons, by a statute age-during.
Malachi 3:8
Doth man deceive God? but ye are deceiving Me, And ye have said: 'In what have we deceived Thee?' The tithe and the heave-offering!

That they might

Nehemiah 13:10
And I know that the portions of the Levites have not been given, and they flee each to his field -- the Levites and the singers, doing the work.
1 Corinthians 9:9
for in the law of Moses it hath been written, 'thou shalt not muzzle an ox treading out corn;' for the oxen doth God care?
Galatians 6:6
And let him who is instructed in the word share with him who is instructing -- in all good things.

General references

2 Kings 12:3
only, the high places have not turned aside, still are the people sacrificing and making perfume in high places.