Parallel
Hebrews 6:13
Nestle 1904 Greek New Testament · Berean Standard Bible
Τῷ γὰρ Ἀβραὰμ ἐπαγγειλάμενος ὁ Θεός ἐπεὶ κατ’ οὐδενὸς εἶχεν μείζονος ὀμόσαι ὤμοσεν καθ’ ἑαυτοῦ
When God made His promise to Abraham, since He had no one greater to swear by, He swore by Himself,