Lastly, to shew whence they could get to know Him (who had sent Him), He adds, I know Him: so if you would know Him, enquire of Me. No one knoweth the Father, save the Son, and he to whom the Son will reveal Him. And if I should say, I know Him not, I should be a liar like unto you. (c. 8:55)
Reproduced in full. Translation: Oxford 1841 (Newman), public domain (Public domain).
Also cites: Tr. xxxi. 4