1 John 2:3–6
3 And hereby we do know that we know him, if we ekeep his commandments. 4 fHe that saith, gI know him, and ekeepeth not his commandments, his a liar, and ithe truth is not in him. 5 But whoso jkeepeth his word, kin him verily is the love of God perfected: lhereby know we that we are in him. 6 He that saith he mabideth in him nought himself also so to walk, even as he walked.
So ch. 1:6.