He told the Pharisees in John 10 the reason they did not believe is that he did not die for them.
“I am the good shepherd: the good shepherd giveth his life for the sheep.” John 10:11 (KJV 1900)
“As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep. And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd. Therefore doth my Father love me, because I lay down my life, that I might take it again.” John 10:15–17 (KJV 1900)
“But ye believe not, because ye are not of my sheep, as I said unto you. My sheep hear my voice, and I know them, and they follow me: And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father’s hand.” John 10:26–29 (KJV 1900)
“I am the good shepherd: the good shepherd giveth his life for the sheep.” John 10:11 (KJV 1900)
“As the Father knoweth me, even so know I the Father: and I lay down my life for the sheep. And other sheep I have, which are not of this fold: them also I must bring, and they shall hear my voice; and there shall be one fold, and one shepherd. Therefore doth my Father love me, because I lay down my life, that I might take it again.” John 10:15–17 (KJV 1900)
“But ye believe not, because ye are not of my sheep, as I said unto you. My sheep hear my voice, and I know them, and they follow me: And I give unto them eternal life; and they shall never perish, neither shall any man pluck them out of my hand. My Father, which gave them me, is greater than all; and no man is able to pluck them out of my Father’s hand.” John 10:26–29 (KJV 1900)