New Revised Standard Version
So bring with you also your brothers of the tribe of Levi, your ancestral tribe, in order that they may be joined to you, and serve you while you and your sons with you are in front of the tent of the covenant.

Contemporary English Version
The Levites are your relatives and are here to help you in your service at the tent.

New American Bible
You shall also present with you your kinsmen of the tribe of Levi, your ancestral tribe, that they may be joined to you and assist you, while you and your sons with you are in front of the tent of the covenant.

Douay-Rheims Bible
And take with thee thy brethren also of the tribe of Levi, and the sceptre of thy father, and let them be ready in hand, and minister to thee: but thou and thy sons shall minister in the tabernacle of the testimony.

And take with thee thy brethren also of the tribe of Levi, and the sceptre of thy father, and let them be ready in hand, and minister to thee: but thou and thy sons shall minister in the tabernacle of the testimony.

joined unto thee.

Numbers 18:4 But let them be with thee, and watch in the charge of the tabernacle, and in all the ceremonies thereof. A stranger shall not join himself with you.

Genesis 29:34 And she conceived the third time, and bore another son, and said: Now also my husband will be joined to me, because I have borne him three sons: and therefore she called his name Levi.

minister

Numbers 3:6-9 Bring the tribe of Levi, and make them stand in the sight of Aaron the priest to minister to him, and let them watch, . . .

Numbers 8:19,22 And have delivered them for a gift to Aaron and his sons out of the midst of the people, to serve me for Israel in the tabernacle of the covenant, and to pray for them, lest there should be a plague among the people, if they should presume to approach unto my sanctuary. . . .

but thou

Numbers 3:10 To Aaron and to his sons, to whom they are delivered by the children of Israel. But thou shalt appoint Aaron and his sons over the service of priesthood. The stranger that approacheth to minister, shall be put to death.

Numbers 4:15 And when Aaron and his sons have wrapped up the sanctuary and the vessels thereof at the removing of the camp, then shall the sons of Caath enter in to carry the things wrapped up: and they shall not touch the vessels of the sanctuary, lest they die. These are the burdens of the sons of Caath: in the tabernacle of the covenant:

Numbers 16:40 That the children of Israel might have for the time to come wherewith they should be admonished, that no stranger or any one that is not of the seed of Aaron should come near to offer incense to the Lord, lest he should suffer as Core suffered, and all his congregation, according as the Lord spoke to Moses.

Numbers 17:7 And when Moses had Laid them up before the Lord in the tabernacle of the testimony:

1 Chronicles 16:39,40 And Sadoc the priest, and his brethren priests, before the tabernacle of the Lord in the high place, which was in Gabaon. . . .

2 Chronicles 30:16 And they stood in their order according to the disposition and law of Moses the man of God: but the priests received the blood which was to be poured out, from the hands of the Levites,

Ezekiel 44:15 But the priests, and Levites, the sons of Sadoc, who kept the ceremonies of my sanctuary, when the children of Israel went astray from me, they shall come near to me, to minister to me: and they shall stand before me, to offer me the fat, and the blood, saith the Lord God.