the two kidneys] It was not sufficient to sacrifice the eare, or foot, or any outward part, which might be parted without losse of life, but the inward parts must be offered, without which the creature cannot live, because the persons for whom the sacrifice was offered, deserved death, and without the death of Christ could not be redeemed; and the sacrificing of these inward parts, signifying the mortifying of the inward lusts and affections of the flesh, Galatians 5:24. having their root in the reines or kidneys, they are therefore here mentioned, for more serious consideration of that part.