Here's a couple that stand pretty well on their own. Take your pick.
John 3:15 That whosoever believeth in him should not perish, but have eternal life.
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
John 3:15 That whosoever believeth in him should not perish, but have eternal life.
Conditional statement. Only the ones who believe will be saved from perishing and have eternal life. Whosoever here is not every man, but the subset of men who meet the condition, i.e. belief.
John 3:16 For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.
Same statement, same condition, same outcome. Whosoever is not every man, but the subset of men who meet the condition.
There is more to salvation than just these verses, although they are a good start. They don't address the totality of the doctrine.
My statement stands, one scripture does not a doctrine make.