Now a man from the family of Levi married a Levite woman.

And the anger of the LORD was kindled against Moses, and he said, Is not Aaron the Levite thy brother? I know that he can speak well. And also, behold, he cometh forth to meet thee: and when he seeth thee, he will be glad in his heart.

And the sons of Merari: Mahli and Mushi. These are the families of the Levites according to their generations.

And Eleazar Aaron's son took him one of the daughters of Putiel to wife; and she bare him Phinehas: these are the heads of the fathers of the Levites according to their families.

then Moses stood in the gate of the camp, and said, “Whoever is on the Lord’s side, come to me!” And all the sons of Levi [the priestly tribe] gathered together to him.

The Levites did as Moses commanded, and about 3,000 men fell dead that day among the people.

Then Moses said [to the Levites], “Dedicate yourselves today to the Lord—for each man has been against his own son and his own brother [in his attempt to escape execution]—so that He may restore and bestow His blessing on you this day.”

This is the sum of the tabernacle, even of the tabernacle of testimony, as it was counted, according to the commandment of Moses, for the service of the Levites, by the hand of Ithamar, son to Aaron the priest.