Hebrews 10:23

Let us maintain the confession of our hope unshaken, for he who has given us his promise will not fail us.

1 Corinthians 1:9

God will not fail you, and it is he who called you into communion with his Son, Jesus Christ, our Lord.

Hebrews 3:6

the faithfulness of Christ was that of a Son set over the House of God. And we are his House--if only we retain, unshaken to the end, the courage and confidence inspired by our hope.

Hebrews 11:11

Again, it was faith that enabled Sarah to conceive (though she was past the age for child-bearing), because she felt sure that he who had given her the promise would not fail her.

1 Corinthians 10:13

No temptation has come upon you that is not common to all mankind. God will not fail you, and he will not allow you to be tempted beyond your strength; but, when he sends the temptation, he will also provide the way of escape, so that you may have strength to endure.

Hebrews 4:14

We have, then, in Jesus, the Son of God, a great High Priest who has passed into the highest Heaven; let us, therefore, hold fast to the Faith which we have professed.

1 Thessalonians 5:24

He who calls you will not fail you; he will complete his work.

2 Thessalonians 3:3

But the Lord will not fail you; he will give you strength, and guard you from Evil.

Titus 1:2

and is based on the hope of Immortal Life, which God, who never lies, promised before the ages began,

Hebrews 3:14

For we now all share in the Christ, if indeed we retain, unshaken to the end, the confidence that we had at the first.

Hebrews 6:18

For he intended us to find great encouragement in these two unchangeable things, which make it impossible for God to prove false--we, I mean, who fled for safety where we might lay hold on the hope set before us.

James 1:6

But let him ask with confidence, never doubting; for the man who doubts is like a wave of the sea driven hither and thither at the mercy of the wind--

Revelation 3:11

I will come quickly. Hold to what you have received, that no one may 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 with confidence, never doubting; for the man who doubts is like a wave of the sea driven hither and thither at the mercy of the wind--

For

Hebrews 6:18
For he intended us to find great encouragement in these two unchangeable things, which make it impossible for God to prove false--we, I mean, who fled for safety where we might lay hold on the hope set before us.
Hebrews 11:11
Again, it was faith that enabled Sarah to conceive (though she was past the age for child-bearing), because she felt sure that he who had given her the promise would not fail her.
1 Corinthians 1:9
God will not fail you, and it is he who called you into communion with his Son, Jesus Christ, our Lord.
1 Corinthians 10:13
No temptation has come upon you that is not common to all mankind. God will not fail you, and he will not allow you to be tempted beyond your strength; but, when he sends the temptation, he will also provide the way of escape, so that you may have strength to endure.
1 Thessalonians 5:24
He who calls you will not fail you; he will complete his work.
2 Thessalonians 3:3
But the Lord will not fail you; he will give you strength, and guard you from Evil.
Titus 1:2
and is based on the hope of Immortal Life, which God, who never lies, promised before the ages began,

General references

Mark 15:38
The Temple curtain was torn in two from top to bottom.