John 6:60
when many of his disciples, who heard him, said, this is strange doctrine, who can hear it?
John 6:66
From that time many of his disciples withdrew, and associated no longer with him.
Matthew 11:6
and happy is he who does not stumble at my appearance.
John 6:41-42
The Jews then murmured against him, for having said, "I am the bread which came down from heaven."
John 8:31
Jesus said therefore to those Jews who believed on him, if you adhere to my doctrine, then will you be my disciples indeed; and ye shall know the truth,
John 8:43
why do not you understand my language? unless because ye cannot bear my doctrine?
Hebrews 5:11
On this head we have many things to say, not easily to be comprehended, because of your prejudices.
2 Peter 3:16
as it were in all his epistles, where he takes notice of these things: in which there are some passages that are difficult to understand, which the illiterate, and unstable wrest, as they do the rest of the scriptures, to their own ruin.