Exodus 27:20-21 New King James Version (NKJV)
The Care of the Lampstand
20 “And you shall command the children of Israel that they bring you pure oil of pressed olives for the light, to cause the lamp to [a]burn continually. 21 In the tabernacle of meeting, outside the veil which is before the Testimony, Aaron and his sons shall tend it from evening until morning before the Lord. It shall be a statute forever to their generations on behalf of the children of Israel.
Exodus 27:20-21 New International Version (NIV)
Oil for the Lampstand
20 “Command the Israelites to bring you clear oil of pressed olives for the light so that the lamps may be kept burning. 21 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.