Whosoever therefore shall swear by the altar,
&c.] Not that Christ allowed of swearing by the altar, or by the temple, or by heaven, or by any creature, animate or inanimate; for such swearing is elsewhere disapproved of by him, and forbid, but if a man did swear by the altar, he ought to know, and consider that he not only
sweareth by it,
but by all the gifts, and offerings that are brought, and laid upon it,
and by all things thereon;
whatever gifts and sacrifices are offered upon it; which, by being put there, become holy, as the altar itself: so that he that swears by the altar, swears also by the gifts of the altar; and consequently, according to their own traditions, such oaths must be binding.