Abbott-Smith Manual Greek Lexicon
σεαυτοῦ (G4572)
43 σεαυτοῦ , -ῆς, -οῦ (in NT not contracted, σαυτοῦ , as in Att..), reflex. prop. of 2nd pers. sing. , used only in gen., dat. and acc. ( of, to ) thyself : Mt 4:6 , Jo 8:13 , I Ti 4:16 , al. (In Hellenistic, the pl. is ἑαυτῶν (q.v.), not ὑμῶν αὐτῶν as in Attic, v. Bl., § 13, 1.) †
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain