Matthew 23:22

22Andκαὶthe [one]ὁhaving swornὀμόσαςbyἐντῷheavenοὐρανῷswearsὀμνύειbyἐνtheτῷthroneθρόνῳτοῦof Godθεοῦandκαὶbyἐνthe [One]τῷsittingκαθημένῳuponἐπάνωitαὐτοῦ.

And the one having sworn by heaven swears by the throne of God and by the One sitting upon it.