John 6:60
"Many therefore of his disciples, when they had heard this, said, This is an hard saying; who can hear it?"
Cross References (ranked by relevance)
From that time many of his disciples went back, and walked no more with him.
Why do ye not understand my speech? even because ye cannot hear my word.
Then said Jesus to those Jews which believed on him, If ye continue in my word, then are ye my disciples indeed;
And blessed is he, whosoever shall not be offended in me.
As also in all his epistles, speaking in them of these things; in which are some things hard to be understood, which they that are unlearned and unstable wrest, as they do also the other scriptures, unto their own destruction.
Of whom we have many things to say, and hard to be uttered, seeing ye are dull of hearing.