Matthew 23:18

And, "Whoever swears by the altar, it is nothing; but whoever swears by the gift that is on it, he is obliged to perform it.'

Surrounding context

23:17 Fools and blind! For which is greater, the gold or the temple that sanctifies the gold?

23:18 And, "Whoever swears by the altar, it is nothing; but whoever swears by the gift that is on it, he is obliged to perform it.'

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

Translation and sources