If anyone wills to do His will, he shall know concerning the doctrine, whether it is from God or whether I speak on My own authority.
John 7:17
Surrounding context
7:16 Jesus answered them and said, "My doctrine is not Mine, but His who sent Me.
7:17 If anyone wills to do His will, he shall know concerning the doctrine, whether it is from God or whether I speak on My own authority.
7:18 He who speaks from himself seeks his own glory; but He who seeks the glory of the One who sent Him is true, and no unrighteousness is in Him.