Before the lamp of God had gone out, Samuel was lying down in the temple of the LORD, where the ark of God was located.

Exodus 25:31
Then you are to make a lampstand of pure, hammered gold. It shall be made of one piece, including its base and shaft, its cups, and its buds and petals.

Exodus 27:21
In the Tent of Meeting, outside the veil that is in front of the Testimony, Aaron and his sons are to tend the lamps before the LORD from evening until morning. This is to be a permanent statute for the Israelites for the generations to come.

Leviticus 24:2
"Command the Israelites to bring you pure oil of pressed olives for the light, to keep the lamps burning continually.

Leviticus 24:3
Outside the veil of the Testimony in the Tent of Meeting, Aaron is to tend the lamps continually before the LORD from evening until morning. This is to be a permanent statute for the generations to come.

1 Samuel 1:9
So after they had finished eating and drinking in Shiloh, Hannah stood up. Now Eli the priest was sitting on a chair by the doorpost of the temple of the LORD.

And ere the lamp of God went out in the temple of the LORD, where the ark of God was, and Samuel was laid down to sleep;