'Chest' in the Bible

Then the disciple whom Jesus loved leaned back against Jesus' chest and asked him, "Lord, who is it?"

Peter turned around and saw the disciple whom Jesus loved following them. (This was the disciple who had leaned back against Jesus' chest at the meal and asked, "Lord, who is the one who is going to betray you?")

and in the midst of the lampstands was one like a son of man. He was dressed in a robe extending down to his feet and he wore a wide golden belt around his chest.