Musanus and His Writings.

And as for Musanus, whom we have mentioned among the foregoing writers, a certain very elegant discourse is extant, which was written by him against some brethren that had gone over to the heresy of the so-called Encratites, which had recently sprung up, and which introduced a strange and pernicious error. It is said that Tatian was the author of this false doctrine.

EusHE 6.28.1