We find the initial reference to the ner tamid in this week’s Torah portion, Parashat T’tzaveh. The parashah opens with the instructions for creating and maintaining the ner tamid. “You shall further instruct the Israelites to bring you clear oil of beaten olives for lighting, for kindling lamps regularly. Aaron and his sons shall set them up in the Tent of Meeting, outside the curtain which is over [the Ark of the Pact], [to burn] from evening to morning before the Eternal. It shall be a due from the Israelites for all time, throughout the ages” (Exodus 27:20-21).
T’tzaveh contains a detailed description of the clothing to be donned by the first priests as they enter God’s presence. One such detail is “On [the robe’s] hem make pomegranates … all around the hem, with bells of gold between them all around.” (Exodus 28:33). We might imagine the jingling of those bells as an announcement of the priest’s intention to come into God’s royal presence.