Matthew 23:20

20The [one]ὁthereforeοὖνhaving swornὀμόσαςbyἐνtheτῷaltarθυσιαστηρίῳswearsὀμνύειbyἐνitαὐτῷandκαὶbyἐνall thingsπᾶσιthat [are]τοῖςuponἐπάνωitαὐτοῦ·

Therefore the one having sworn by the altar swears by it and by all things that [are] upon it.