Kehillah in Thessalonika I 2:13

Orthodox Jewish Bible

¹³ And for this reason also we constantly offer hodayah to Hashem that when you received (as “Ani Maamin” authoritative teaching) the Dvar Hashem, the Word of Hachrazah (Proclamation, Kerygma) from us, you received it not as the dvar HaBnei Adam but, as it actually is, the Dvar Hashem, which also is at work in you who have emunah.