'Sons of Levi' in the Bible

Then the priests, the sons of Levi, shall come near, for the Lord your God has chosen them to serve Him and to bless in the name of the Lord; and every dispute and every assault shall be settled by them.

So Moses wrote this law and gave it to the priests, the sons of Levi who carried the ark of the covenant of the Lord, and to all the elders of Israel.