joined unto thee.

Numbers 18:4
They are to join you and attend to the obligations of the Tent of Meeting, doing all the work at the Tent; but no outsider may come near you.

Genesis 29:34
Once again Leah conceived and gave birth to a son, and she said, "Now at last my husband will become attached to me, because I have borne him three sons." So he was named Levi.

minister

Numbers 3:6-9
"Bring the tribe of Levi and present them to Aaron the priest to assist him. . . .

Numbers 8:19, 22
And I have given the Levites as a gift to Aaron and his sons from among the Israelites, to perform the service for the Israelites at the Tent of Meeting and to make atonement on their behalf, so that no plague will come against the Israelites when they approach the sanctuary." . . .

but thou

Numbers 3:10
So you shall appoint Aaron and his sons to carry out the duties of the priesthood; but any layman who approaches the tabernacle must be put to death."

Numbers 4:15
When Aaron and his sons have finished covering the holy objects and all their equipment, as soon as the camp is ready to move, the Kohathites shall come and do the carrying. But they must not touch the holy objects, or they will die. These are the transportation duties of the Kohathites regarding the Tent of Meeting.

Numbers 16:40
just as the LORD commanded him through Moses. This was to be a reminder for the Israelites that no outsider who is not a descendant of Aaron should approach to offer incense before the LORD, lest he become like Korah and his followers.

Numbers 17:7
Then Moses placed the staffs before the LORD in the Tent of the Testimony.

1 Chronicles 16:39, 40
And David left Zadok the priest and his fellow priests before the tabernacle of the LORD at the high place in Gibeon . . .

2 Chronicles 30:16
They stood at their prescribed posts, according to the law of Moses, the man of God. The priests sprinkled the blood, which they received from the hand of the Levites.

Ezekiel 44:15
But the Levitical priests, who are descended from Zadok and who kept charge of My sanctuary when the Israelites went astray from Me, are to approach Me to minister before Me. They will stand before Me to offer Me fat and blood, declares the Lord GOD.