ἐν ἀπορρήτῳ λέγειν
From LSJ
εἰς τὸ ὄνομα τοῦ Πατρὸς καὶ τοῦ Υἱοῦ καὶ τοῦ Ἁγίου Πνεύματος → in the name of the Father, and of the Son, and of the Holy Spirit
εἰς τὸ ὄνομα τοῦ Πατρὸς καὶ τοῦ Υἱοῦ καὶ τοῦ Ἁγίου Πνεύματος → in the name of the Father, and of the Son, and of the Holy Spirit
inform confidentially, inform in strict confidence
