Matthew 23:20 KJV
Whoso therefore shall swear by the altar, sweareth by it, and by all things thereon.
Matthew 23:20, King James Version
In context
19 Ye fools and blind: for whether is greater, the gift, or the altar that sanctifieth the gift?
20 Whoso therefore shall swear by the altar, sweareth by it, and by all things thereon.
21 And whoso shall swear by the temple, sweareth by it, and by him that dwelleth therein.