I believe Jesus clearly said, and I am paraphrasing.
If you do not believe I am the Father you will die in your sins.
John 8:19-24
Then said they unto him, Where is thy Father? Jesus answered, Ye neither know me, nor my Father: if ye had known me, ye should have known my Father also.
These words spake Jesus in the treasury, as he taught in the temple: and no man laid hands on him; for his hour was not yetcome.
Then said Jesus again unto them, I go my way, and ye shall seek me, and shall die in your sins: whither I go, ye cannot come.
Then said the Jews, Will he kill himself? because he saith, Whither I go, ye cannot come.
And he said unto them, Ye are from beneath; I am from above: ye are of this world; I am not of this world.
Verse 24.
I said therefore unto you, that ye shall die in your sins: for if ye believe not that I am he, ye shall die in your sins.