1 Samuel 3:1-3

1Now the boy Samuel was attending to the service of the Lord under the supervision of Eli. The word of the Lord was rare and precious in those days; visions [that is, new revelations of divine truth] were not widespread.

2Yet it happened at that time, as Eli was lying down in his own place (now his eyesight had begun to grow dim and he could not see well).

3and the [oil] lamp of God had not yet gone out, and Samuel was lying down in the temple of the Lord, where the ark of God was,