Numbers 4:5 "When the camp sets out, Aaron and his sons shall go in and they shall take down the veil of the screen and cover the ark of the testimony with it;

Numbers 4:6 and they shall lay a covering of porpoise skin on it, and shall spread over it a cloth of pure blue, and shall insert its poles.

Deuteronomy 10:8 At that time the LORD set apart the tribe of Levi to carry the ark of the covenant of the LORD, to stand before the LORD to serve Him and to bless in His name until this day.

Deuteronomy 31:25 that Moses commanded the Levites who carried the ark of the covenant of the LORD, saying,

Deuteronomy 31:26 "Take this book of the law and place it beside the ark of the covenant of the LORD your God, that it may remain there as a witness against you.

Joshua 3:3 and they commanded the people, saying, "When you see the ark of the covenant of the LORD your God with the Levitical priests carrying it, then you shall set out from your place and go after it. (NASB ©1995)