Hebrews 10:23

let us hold fast the confession of the hope without wavering (for faithful is He Who promised);

1 Corinthians 1:9

God is faithful, through Whom ye were called into the fellowship of His Son, Jesus Christ our Lord.

Hebrews 3:6

but Christ as a Son over His own house; Whose house are we, if we hold fast the confidence and the glorying of our hope firm to the end.

Hebrews 11:11

By faith Sarah herself also received power to conceive seed, even when past the age of child-bearing, since she accounted Him faithful, Who promised.

1 Corinthians 10:13

A temptation has not taken you, except such as is common to man; but God is faithful, Who will not suffer you to be tempted above what ye are able, but will with the temptation make also the way of escape, that ye may be able to bear it.

Hebrews 4:14

Having, therefore, a great High Priest, Who hath passed through the heavens, Jesus, the Son of God, let us hold fast the confession;

1 Thessalonians 5:24

Faithful is He Who calleth you, Who also will do it.

2 Thessalonians 3:3

But the Lord is faithful, Who will establish you, and guard you from the evil one.

Titus 1:2

upon hope of eternal life which God, Who cannot lie, promised before eternal times,

Hebrews 3:14

for we have become partakers of Christ, if we hold fast the beginning of our confidence firm to the end:

Hebrews 6:18

that, through two immutable facts, in which it is impossible that God should lie, we may have strong encouragement, who fled for refuge to lay hold of the hope set before us;

James 1:6

but let him ask in faith, nothing doubting; for he who doubts is like a wave of the sea, wind-driven and tossed.

Revelation 3:11

I am coming speedily; hold fast that which you have, that no one take your crown.

Treasury of Scripture Knowledge

Summary

Let us hold fast the profession of our faith without wavering; (for he is faithful that promised;)

Wavering

General references

Bible References

Wavering

James 1:6
but let him ask in faith, nothing doubting; for he who doubts is like a wave of the sea, wind-driven and tossed.

For

Hebrews 6:18
that, through two immutable facts, in which it is impossible that God should lie, we may have strong encouragement, who fled for refuge to lay hold of the hope set before us;
Hebrews 11:11
By faith Sarah herself also received power to conceive seed, even when past the age of child-bearing, since she accounted Him faithful, Who promised.
1 Corinthians 1:9
God is faithful, through Whom ye were called into the fellowship of His Son, Jesus Christ our Lord.
1 Corinthians 10:13
A temptation has not taken you, except such as is common to man; but God is faithful, Who will not suffer you to be tempted above what ye are able, but will with the temptation make also the way of escape, that ye may be able to bear it.
1 Thessalonians 5:24
Faithful is He Who calleth you, Who also will do it.
2 Thessalonians 3:3
But the Lord is faithful, Who will establish you, and guard you from the evil one.
Titus 1:2
upon hope of eternal life which God, Who cannot lie, promised before eternal times,

General references

Mark 15:38
And the veil of the temple was rent in two from the top to the bottom.