Leviticus 24:2

“And you shall command the sons of Israel, that they bring you clear oil of beaten olives for the light, to make a lamp burn continually.

“And the assignment of Eleazar the son of Aaron the priest is the oil for the light and the fragrant incense and the continual grain offering and the anointing oil—the assignment of all the tabernacle and of all that is in it, with the sanctuary and its furnishings.”

“Speak to Aaron and say to him, ‘When you mount the lamps, the seven lamps will give light in the front of the lampstand.’”

and the lamp of God had not yet gone out, and Samuel was lying down in the temple of Yahweh where the ark of God was,