One of the Twelve Apostles chosen by Jesus during his mortal ministry. He was the brother of John. He was one of three Apostles chosen to be with Jesus on certain special occasions: at the raising of the daughter of Jairus (Mark 5: 37), at the Transfiguration (Matt. 17: 1; Mark 9: 2; Luke 9: 28), and at Gethsemane (Matt. 26: 37; Mark 14: 33). With Peter and John, he restored the Melchizedek Priesthood to the earth by ordaining Joseph Smith (D&C 27: 12; 128: 20; JS-H 1: 72).