Exodus 27:21

In the tent of meeting , outside the veil that is before the testimony , Aaron and his sons shall tend it from evening to morning before the Lord . It shall be a statute forever to be observed throughout their generations by the people of Israel .

In the tent of meeting, outside the curtain that shields the ark of the covenant law, Aaron and his sons are to keep the lamps burning before the Lord from evening till morning. This is to be a lasting ordinance among the Israelites for the generations to come.

In the tabernacle of the congregation without the vail, which is before the testimony, Aaron and his sons shall order it from evening to morning before the Lord : it shall be a statute for ever unto their generations on the behalf of the children of Israel. Exodus 26 Books Exodus 28