John 6:60
Then many of his disciples, when they heard these things, said, "This is a difficult saying! Who can understand it?"
John 6:66
After this many of his disciples quit following him and did not accompany him any longer.
Matthew 11:6
Blessed is anyone who takes no offense at me."
John 6:41-42
Then the Jews who were hostile to Jesus began complaining about him because he said, "I am the bread that came down from heaven,"
John 8:31
Then Jesus said to those Judeans who had believed him, "If you continue to follow my teaching, you are really my disciples
John 8:43
Why don't you understand what I am saying? It is because you cannot accept my teaching.
Hebrews 5:11
On this topic we have much to say and it is difficult to explain, since you have become sluggish in hearing.
2 Peter 3:16
speaking of these things in all his letters. Some things in these letters are hard to understand, things the ignorant and unstable twist to their own destruction, as they also do to the rest of the scriptures.