Deuteronomy 21:5

And the priests, sons of Levi, have come nigh -- for on them hath Jehovah thy God fixed to serve Him, and to bless in the name of Jehovah, and by their mouth is every strife, and every stroke --

1 Chronicles 23:13

Sons of Amram: Aaron and Moses; and Aaron is separated for his sanctifying the holy of holies, he and his sons -- unto the age, to make perfume before Jehovah, to serve Him, and to bless in His name -- unto the age.

Deuteronomy 10:8

'At that time hath Jehovah separated the tribe of Levi, to bear the ark of the covenant of Jehovah, to stand before Jehovah, to serve Him, and to bless in His name, unto this day,

Numbers 6:22-27

And Jehovah speaketh unto Moses, saying,

Deuteronomy 17:8-12

When anything is too hard for thee for judgment, between blood and blood, between plea and plea, and between stroke and stroke -- matters of strife within thy gates -- then thou hast risen, and gone up unto the place on which Jehovah thy God doth fix,

Deuteronomy 18:5

for on him hath Jehovah thy God fixed, out of all thy tribes, to stand to serve in the name of Jehovah, He and his sons continually.

Deuteronomy 19:17

then have both the men who have the strife stood before Jehovah, before the priests and the judges who are in those days,

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.

Treasury of Scripture Knowledge

Summary

And the priests the sons of Levi shall come near; for them the LORD thy God hath chosen to minister unto him, and to bless in the name of the LORD; and by their word shall every controversy and every stroke be tried:

General references

Bible References

For them

Deuteronomy 10:8
'At that time hath Jehovah separated the tribe of Levi, to bear the ark of the covenant of Jehovah, to stand before Jehovah, to serve Him, and to bless in His name, unto this day,
Deuteronomy 18:5
for on him hath Jehovah thy God fixed, out of all thy tribes, to stand to serve in the name of Jehovah, He and his sons continually.
Numbers 6:22
And Jehovah speaketh unto Moses, saying,
1 Chronicles 23:13
Sons of Amram: Aaron and Moses; and Aaron is separated for his sanctifying the holy of holies, he and his sons -- unto the age, to make perfume before Jehovah, to serve Him, and to bless in His name -- unto the age.

By their word

Deuteronomy 17:8
When anything is too hard for thee for judgment, between blood and blood, between plea and plea, and between stroke and stroke -- matters of strife within thy gates -- then thou hast risen, and gone up unto the place on which Jehovah thy God doth fix,
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.

General references

Numbers 6:23
'Speak unto Aaron, and unto his sons, saying, Thus ye do bless the sons of Israel, saying to them,
Deuteronomy 19:17
then have both the men who have the strife stood before Jehovah, before the priests and the judges who are in those days,