Matthew 7
13 Enter ye in at the strait gate: for wide is the gate, and broad is the way, that leadeth to destruction, and many there be which go in thereat:
14 Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.
Peter speaks even stronger.
1st Peter 4:18 And if the righteous scarcely be saved, where shall the ungodly and the sinner appear?
To deny that few will be saved is to deny the Word itself