Yochanan I 4:1-2

Orthodox Jewish Bible

4 Chaverim, do not believe every ruach. [YIRMEYAH 29:8] But test the ruchot (spirits), if they be of Hashem, because many nevi’ei sheker have gone out into the Olam Hazeh.

² By this we have da’as of the Ruach Hakodesh of Hashem: every ruach which makes hoda’ah (confession) of Yehoshua, Rebbe, Melech HaMoshiach as having come in the basar is of Hashem,