'Ark of the Covenant' in the Bible

'At that time hath Jehovah separated the tribe of Levi, to bear the ark of the covenant of Jehovah, to stand before Jehovah, to serve Him, and to bless in His name, unto this day,

And Moses writeth this law, and giveth it unto the priests (sons of Levi, those bearing the ark of the covenant of Jehovah), and unto all the elders of Israel,

that Moses commandeth the Levites bearing the ark of the covenant of Jehovah, saying,

'Take this Book of the Law, and thou hast set it on the side of the ark of the covenant of Jehovah your God, and it hath been there against thee for a witness;