Exodus 27:20-21 CEB

Olive oil for the lampstand

20 You must require the Israelites to bring you pure oil of crushed olives for the light so that the lamp may be set up to burn continually.

References for Exodus 27:20

      21 In the meeting tent, outside the veil that hangs in front of the covenant document, Aaron and his sons will tend the lamp from evening to morning in the LORD's presence. It will be a permanent regulation for the Israelites in every generation.