Both of these statements mean the same thing. Sheba is emphasizing that he and the tribes of Israel have no relationship with David. Alternate translation: "The inheritance of David and his father's family does not belong to us" or "We are not a part of David and his father's family" (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-explicit]])