NO, He didnt. He explained that rather succinctly as well.
John 6:64 But there are some of you that believe not. For Jesus knew from the beginning who they were that believed not, and who should betray him. 65 And he said, Therefore said I unto you, that no man can come unto me, except it were given unto him of my Father.
So you see. He knew who had not been believers anyway. They wouldnt have believed what He was saying even if it was written in scripture. Just like many Catholics and doubters in every church, denomination and area of life.
Which He said about 5 or 6 times, so they couldn't miss it.