Leviticus 24:5

“Command the children of Israel, that they bring to you pure olive oil beaten for the light, to cause a lamp to burn continually.

Outside of the veil of the Testimony, in the Tent of Meeting, Aaron shall keep it in order from evening to morning before the LORD continually. It shall be a statute forever throughout your generations.

He shall keep in order the lamps on the pure gold lamp stand before the LORD continually.

You shall set them in two rows, six on a row, on the pure gold table before the LORD.

You shall put pure frankincense on each row, that it may be to the bread for a memorial, even an offering made by fire to the LORD.

Every Sabbath day he shall set it in order before the LORD continually. It is an everlasting covenant on the behalf of the children of Israel.