Matthew 7:14

how strait is the gate, and compressed the way that is leading to the life, and few are those finding it!

Acts 14:22

confirming the souls of the disciples, exhorting to remain in the faith, and that through many tribulations it behoveth us to enter into the reign of God,

Proverbs 4:26-27

Ponder thou the path of thy feet, And all thy ways are established.

Proverbs 8:20

In a path of righteousness I cause to walk, In midst of paths of judgment,

Isaiah 30:21

And thine ear heareth a word behind thee, Saying, 'This is the way, go ye in it,' When ye turn to the right, And when ye turn to the left.

Isaiah 35:8

And a highway hath been there, and a way, And the 'way of holiness' is called to it, Not pass over it doth the unclean, And He Himself is by them, Whoso is going in the way -- even fools err not.

Isaiah 57:14

And he hath said, 'Raise up, raise up, prepare a way, Lift a stumbling-block out of the way of My people.'

Jeremiah 6:16

Thus said Jehovah: Stand ye by the ways and see, and ask for paths of old, Where is this -- the good way? and go ye in it, And find rest for yourselves. And they say, 'We do not go.'

Matthew 16:24-25

Then said Jesus to his disciples, 'If any one doth will to come after me, let him disown himself, and take up his cross, and follow me,

Matthew 20:16

So the last shall be first, and the first last, for many are called, and few chosen.'

Matthew 22:14

for many are called, and few chosen.'

Matthew 25:1-12

'Then shall the reign of the heavens be likened to ten virgins, who, having taken their lamps, went forth to meet the bridegroom;

Mark 8:34

And having called near the multitude, with his disciples, he said to them, 'Whoever doth will to come after me -- let him disown himself, and take up his cross, and follow me;

Luke 12:32

'Fear not, little flock, because your Father did delight to give you the reign;

Luke 13:23-30

and a certain one said to him, 'Sir, are those saved few?' and he said unto them,

John 15:18-20

if the world doth hate you, ye know that it hath hated me before you;

John 16:2

out of the synagogues they will put you; but an hour doth come, that every one who hath killed you, may think to offer service unto God;

John 16:33

these things I have spoken to you, that in me ye may have peace, in the world ye shall have tribulation, but take courage -- I have overcome the world.'

Romans 9:27-29

And Isaiah doth cry concerning Israel, 'If the number of the sons of Israel may be as the sand of the sea, the remnant shall be saved;

Romans 9:32

wherefore? because -- not by faith, but as by works of law; for they did stumble at the stone of stumbling,

Romans 11:5-6

So then also in the present time a remnant according to the choice of grace there hath been;

Romans 12:2

and be not conformed to this age, but be transformed by the renewing of your mind, for your proving what is the will of God -- the good, and acceptable, and perfect.

Ephesians 2:2-3

in which once ye did walk according to the age of this world, according to the ruler of the authority of the air, of the spirit that is now working in the sons of disobedience,

1 Thessalonians 3:2-5

and did send Timotheus -- our brother, and a ministrant of God, and our fellow-workman in the good news of the Christ -- to establish you, and to comfort you concerning your faith,

1 Peter 3:20-21

who sometime disbelieved, when once the long-suffering of God did wait, in days of Noah -- an ark being preparing -- in which few, that is, eight souls, were saved through water;

Treasury of Scripture Knowledge

Summary

Because strait is the gate, and narrow is the way, which leadeth unto life, and few there be that find it.

Bible References

Because

Matthew 16:24
Then said Jesus to his disciples, 'If any one doth will to come after me, let him disown himself, and take up his cross, and follow me,
Proverbs 4:26
Ponder thou the path of thy feet, And all thy ways are established.
Proverbs 8:20
In a path of righteousness I cause to walk, In midst of paths of judgment,
Isaiah 30:21
And thine ear heareth a word behind thee, Saying, 'This is the way, go ye in it,' When ye turn to the right, And when ye turn to the left.
Isaiah 35:8
And a highway hath been there, and a way, And the 'way of holiness' is called to it, Not pass over it doth the unclean, And He Himself is by them, Whoso is going in the way -- even fools err not.
Isaiah 57:14
And he hath said, 'Raise up, raise up, prepare a way, Lift a stumbling-block out of the way of My people.'
Jeremiah 6:16
Thus said Jehovah: Stand ye by the ways and see, and ask for paths of old, Where is this -- the good way? and go ye in it, And find rest for yourselves. And they say, 'We do not go.'
Mark 8:34
And having called near the multitude, with his disciples, he said to them, 'Whoever doth will to come after me -- let him disown himself, and take up his cross, and follow me;
John 15:18
if the world doth hate you, ye know that it hath hated me before you;
John 16:2
out of the synagogues they will put you; but an hour doth come, that every one who hath killed you, may think to offer service unto God;
Acts 14:22
confirming the souls of the disciples, exhorting to remain in the faith, and that through many tribulations it behoveth us to enter into the reign of God,
1 Thessalonians 3:2
and did send Timotheus -- our brother, and a ministrant of God, and our fellow-workman in the good news of the Christ -- to establish you, and to comfort you concerning your faith,

General references

Numbers 4:48
even their numbered ones are eight thousand and five hundred and eighty;
Proverbs 2:9
Then understandest thou righteousness, And judgment, and uprightness -- every good path.
Proverbs 14:12
There is a way -- right before a man, And its latter end are ways of death.
Matthew 22:14
for many are called, and few chosen.'
Romans 3:17
And a way of peace they did not know.