Psalms 99:6

Moses, who sometimes performed the functions of priest, Exodus 24; Exodus 40:22, and Aaron among His priests, and Samuel among them that call upon His name, 1 Samuel 7:8, these three being prominent representatives of the Old Testament Church; they called upon the Lord, their entire worship being an expression of their faith in Jehovah of Israel, and He answered them, thus recognizing them as His children by faith, with whom He was united in the fellowship which obtains between the Lord and all believers.