Matthew 23:20

Therefore he who swears by the altar, swears by it and by all things on it.

Surrounding context

23:19 Fools and blind! For which is greater, the gift or the altar that sanctifies the gift?

23:20 Therefore he who swears by the altar, swears by it and by all things on it.

23:21 He who swears by the temple, swears by it and by Him who dwells in it.

Translation and sources