Then David said, No one ought to carry the ark of God except the Levites, for God has chosen them to carry the ark of God, and to minister to Him forever.
because their office was to wait on the sons of Aaron for the service of the house of Jehovah, in the courts and in the chambers, and in the purifying of all holy things, and the work of the service of the house of God
and that they should keep the charge of the tabernacle of the congregation, and the charge of the Holy Place, and the charge of their brothers, the sons of Aaron, in the service of the house of Jehovah.
And they set the priests in their sections, and the Levites in their divisions, for the service of God which is at Jerusalem, as it is written in the book of Moses.
And behold, I have given the sons of Levi all the tenth in Israel for an inheritance, for their service which they serve, the service of the tabernacle of the congregation.
And the tabernacle of the congregation shall go forward with the camp of the Levites in the midst of the camp. As they camp, so they shall go forward, each man in his place, by their banners.
At that time Jehovah separated the tribe of Levi to carry the ark of the covenant of Jehovah, to stand before Jehovah to minister to Him, and to bless in His name, until today.