Understanding God's Heart For Us in Song
20 “You shall command the children of Israel, that they bring to you pure olive oil beaten for the light, to cause a lamp to burn continually.
21 In the Tent of Meeting, outside the veil which is before the covenant, Aaron and his sons shall keep it in order from evening to morning before Yahweh: it shall be a statute forever throughout their generations on the behalf of the children of Israel.