1 John 2 21
I'm not writing because you don't know the truth, but because you do know it, and because no lie comes from the truth.
Compare with other 3 random translations
YLT 1 John 2:21I did not write to you because ye have not known the truth, but because ye have known it, and because no lie is of the truth.
CSB 1 John 2:21I have not written to you because you don’t know the truth, but because you do know it, and because no lie comes from the truth.
NCV 1 John 2:21I do not write to you because you do not know the truth but because you do know the truth. And you know that no lie comes from the truth.