Matthew 23:20
He therefore who swears by the altar, swears by it and by everything on it.
World English Bible (Public Domain)
In context
Before · Matthew 23:18–19
18And, ‘Whoever swears by the altar, it is nothing; but whoever swears by the gift that is on it, he is obligated.’ 19You blind fools! For which is greater, the gift, or the altar that sanctifies the gift?
20He therefore who swears by the altar, swears by it and by everything on it.