Mark 16:16
He that believeth and is baptized shall be saved; but he that believeth not shall be damned.
Romans 14:23
And he that doubteth is damned if he eat, because he eateth not of faith: for whatsoever is not of faith is sin.
2 Thessalonians 2:12
That they all might be damned who believed not the truth, but had pleasure in unrighteousness.