Matthew 22:14
"For there are many called, but few chosen."
Revelation 17:14
They will make war upon the Lamb, and the Lamb will triumph over them; for He is Lord of lords and King of kings. And those who accompany Him--called, as they are, and chosen, and faithful--shall share in the victory."
Matthew 7:13-14
"Enter by the narrow gate; for wide is the gate and broad the road which leads to ruin, and many there are who enter by it;
Matthew 20:16
"So the last shall be first, and the first last."
Matthew 24:22
And if those days had not been cut short, no one would escape; but for the sake of God's own People those days will be cut short.
Luke 13:23-24
when some one asked Him, "Sir, are there but few who are to be saved?"
2 Peter 1:10
For this reason, brethren, be all the more in earnest to make sure that God has called you and chosen you; for it is certain that so long as you practise these things, you will never stumble.