And he that shall swear by heaven, swears by the throne of God, and by him who sits thereon.
All Commentaries on Matthew 23:22 Go To Matthew 23
Jerome
AD 420
Again, if one swore by the altar, none held him guilty of perjury; but if be swore by the gift or the victims or the other things which are offered to God upon the altar, this they exacted most rigorously. And all this they did not out of fear of God, but out of covetousness. Thus the Lord charges them with both folly and fraud, inasmuch as the altar is much greater than the victims which are sanctified by the altar.