Scoffers

...there shall come in the last days scoffers, walking after their own lusts,
And saying,
'Where is the promise of his coming?
for since the fathers fell asleep, all things continue as they were from the beginning of the creation.'
--II Peter 3:3-4

The scoffers who question the return of the Lord are themselves proof of the truth of His Word.

Even those who do not believe in Him fulfill His Word.