"Enter by the narrow gate; for the gate is wide and the way is easy, that leads to destruction, and those who enter by it are many. For the gate is narrow and the way is hard, that leads to life, and those who find it are few."
-- Matthew 7:13f
"For many are called, but few are chosen."
-- Matthew 22:14
And some one said to him, "Lord, will those who are saved be few?" And he said to them, "Strive to enter by the narrow door; for many, I tell you, will seek to enter and will not be able."
-- Luke 13:23f.
"Not every one who says to me, 'Lord, Lord,' shall enter the kingdom of heaven, but he who does the will of my Father who is in heaven. On that day many will say to me, 'Lord, Lord, did we not prophesy in your name, and cast out demons in your name, and do many mighty works in your name?' And then will I declare to them, 'I never knew you; depart from me, you evildoers.'"
-- Matthew 7:21ff.
-- Matthew 24:21f.
And [the disciples] were astonished out of measure, saying among themselves, 'Who then can be saved?'
-- Mark 10:26
When his disciples heard it, they were exceedingly amazed, saying, 'Who then can be saved?'
-- Matthew 19:25
"And except that the Lord had shortened those days, no flesh should be saved: but for the elect's sake, whom he hath chosen, he hath shortened the days."
-- Mark 13:20
And they that heard it said, 'Who then can be saved?'
-- Luke 18:26
