John Gill Commentary John 8:38

"I speak the things which I have seen with [my] Father: and ye also do the things which ye heard from [your] father." — John 8:38 (ASV)

I speak that which I have seen with my Father
This is an aggravation of the sin of the Jews, in seeking to kill Christ, on account of his doctrine, since it was not his own, but his Father's; was not merely human, but divine; was what he the only begotten Son, that lay in the bosom of his Father, had seen in his heart, in his purposes, and decrees, in his council, and covenant, and so was clear, complete, certain, and to be depended on:

and you do that which you have seen with your father ;
meaning the devil, whom, though they had not seen with their eyes, nor any of his personal actions; yet acted so much under his influence, and according to his will, as if they had close and intimate consultation with him, and took their plan of operation from him, and had him continually before them, as their example and pattern, to copy after. The Ethiopic version reads, "what you have heard"; and so it is read in three of Beza's copies, and in three of Stephens's.