Yochanan I 3:8-10

8 The one practicing averos is of Hasatan, because from the beginning Hasatan sins. For this tachlis was made hisgalus of the Ben HaElohim, that he might destroy the pe’ulot Hasatan.

9 Everyone having been born of Hashem is not practicing chet, because His Zera makes maon in him, and he cannot abide sinning, because he is born of Hashem. [TEHILLIM 119:3]

10 By this is made hisgalus of the yeladim of Hashem and the yeladim of Hasatan: everyone not practicing tzedek is not of Hashem; also the one not having ahavah for his Ach b’Moshiach.