'Burden' in the Bible

And Naaman saith, 'If not -- let be given, I pray thee, to thy servant, a couple of mules' burden of earth, for thy servant doth make no more burnt-offering and sacrifice to other gods, but to Jehovah.

And Hazael goeth to meet him, and taketh a present in his hand, even of every good thing of Damascus, a burden of forty camels, and he cometh in and standeth before him, and saith, 'Thy son Ben-Hadad, king of Aram, hath sent me unto thee, saying, Do I revive from this sickness?'

And Jehu saith unto Bidkar his captain, 'Lift up, cast him into the portion of the field of Naboth the Jezreelite -- for, remember, I and thou were riding together after Ahab his father, and Jehovah lifted upon him this burden: