1 John 2:19-21

Young's Literal Translation

¹⁹ out of us they went forth, but they were not of us, for if they had been of us, they would have remained with us; but -- that they might be manifested that they are not all of us.

²⁰ And ye have an anointing from the Holy One, and have known all things;

²¹ I 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.