'Arm' in the Bible

And even before his words were ended, Rebekah, the daughter of Bethuel, the son of Milcah, who was the wife of Nahor, Abraham's brother, came out with her water-vessel on her arm.

And even while I was saying this to myself, Rebekah came out with her vessel on her arm; and she went down to the spring to get water; and I said to her, Give me a drink.

And straight away she took down her vessel from her arm, and said, Take a drink, and I will get water for your camels.