Rabbi Yochanan ben Nuri says: — " The Holy One — blessed be He! — took Shem and separated him to be a priest to Himself, that he might serve before Him. He also caused His Shechinah to rest with him, and called his name Melchizedek, priest of the Most High and king of Salem. His brother Japheth even studied the law in his school, until Abraham came and also learned the law in the school of Shem, where God Himself instructed Abraham, so that all else he had learned from the lips of man was forgotten. Then came Abraham and prayed to God that His Shechinah might ever rest in the house of Shem, which also was promised to him; as it is said (Ps. ex. 4), ( Thou art a priest forever after the order of Melchizedek. }