'Ark of the Covenant' in the Bible

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.

And Moses wrote this Law and delivered it to the priests, the sons of Levi, who carried the ark of the covenant of Jehovah, and to all the elders of Israel.

Moses commanded the Levites who carried the ark of the covenant of Jehovah, saying,

Take this book of the Law, and put it in the side of the ark of the covenant of Jehovah your God, so that it may be there for a witness against you.