'Backs' in the Bible

For our fathers have done evil, sinning in the eyes of the Lord our God, and have given him up, turning away their faces from the house of the Lord, and turning their backs on him.

And he said to the Levites, the teachers of all Israel, who were holy to the Lord, See, the holy ark is in the house which Solomon, the son of David, king of Israel, made; it will no longer have to be transported on your backs: now be the servants of the Lord your God and his people Israel,