John 7:17-19

Young's Literal Translation

¹⁷ if any one may will to do His will, he shall know concerning the teaching, whether it is of God, or -- I do speak from myself.

¹⁸ `He who is speaking from himself his own glory doth seek, but he who is seeking the glory of him who sent him, this one is true, and unrighteousness is not in him;

¹⁹ hath not Moses given you the law? and none of you doth the law; why me do ye seek to kill?'