Occurrences in the NT: 30
ὀμνύω(so Hdt. and some Att. writers) and ὄμνυμι (so generally in Att. prose and always in Trag.; Mk 14:71, -ύναι), [in LXX chiefly for שׁבע ni.;]
to swear, affirm by oath: Mt 26:74, Mk 14:71, He 7:21; seq. εἰ (q.v.), He 3:11 4:3; c. dat. pers., Mk 6:23; id. c. inf., He 3:18; seq. ὅρκῳ, Ac 2:30; ὀ. ὅρκον πρός, c. acc. pers. (cl.), Lk 1:73; c. acc. (of that by which one swears; cl., v. MM, xviii), Ja 5:12; seq. κατά, c. gen. (LXX; Bl., § 34, 1), He 6:13, 16; seq. ἐν (εἰς), as in Heb. (Bl., § 39, 4), Mt 5:34, 36 23:16, 18, 20-22, Re 10:6 (Bl., § 70, 3).†