Psalm 99:6 in the King James Version
Moses and Aaron among his priests, and Samuel among them that call upon his name; they called upon the LORD, and he answered them.
Context
5 Exalt the LORD our God. Worship at his footstool. He is Holy!
6 Moses and Aaron were among his priests, Samuel was among those who call on his name. They called on the LORD, and he answered them.
7 He spoke to them in the pillar of cloud. They kept his testimonies, the statute that he gave them.