ὅρκῳ horkō — 2 Occurrences
Acts 2:30 - N-DMS
GRK:εἰδὼς ὅτι ὅρκῳ ὤμοσεν αὐτῷ
NAS: HAD SWORN TO HIM WITH AN OATH TO SEAT
KJV: had sworn with an oath to him,
INT: knowing that with an oath swore to him
Hebrews 6:17 - N-DMS
GRK:αὐτοῦ ἐμεσίτευσεν ὅρκῳ
NAS: interposed with an oath,
KJV: counsel, confirmed [it] by an oath:
INT: of him he guaranteed by an oath