Numbers 1:48-50

Amplified Bible

⁴⁸ For the Lord had said to Moses, ⁴⁹ “Only the tribe of Levi you shall not number, nor shall you take their census among the sons of Israel [since they are unavailable to go to war]. ⁵⁰ But appoint the Levites over the tabernacle (sanctuary) of the Testimony, and over all its furnishings and all things that belong to it. They shall carry the tabernacle [when traveling] and all its furnishings, and they shall take care of it and camp around it.