James 1:6

But let him ask in faith, doubting not: for he that doubts, is like a wave of the sea, driven by the wind, and tossed.

Ephesians 4:14

that we might no longer be children, tossed and carried about by every wind of teaching, through the artifice of men, through craftiness used by them for the deliberate planning of deceit;

Matthew 21:21-22

Jesus answered and said to them: Verily I say to you, If you have faith, and doubt not, you shall do, not only what is done to the fig-tree, but even if you shall say to this mountain, Be taken up, and be thrown into the sea, it shall be done.

Mark 11:22-24

And Jesus answered and said to them: Have faith in God.

1 Timothy 2:8

I will, therefore, that the men pray everywhere, lifting up holy hands without wrath and disputation.

Hebrews 10:23

let us hold fast the unwavering confession of our hope, for he is faithful who has promised;

Hebrews 11:6

But without faith it is impossible to please him; for he that comes to God must believe that he is, and that he is a rewarder of those who diligently seek him.

Hebrews 13:9

Be not carried away by various and strange teachings: for it is good that the heart be strengthened with grace, not with meats, which have not profited those who were occupied with them.

2 Peter 2:17

These men are fountains without water, clouds driven by a tempest, for whom the gloom of darkness is reserved forever.

Jude 1:12-13

These, while feasting with you, are- spots in your love-feasts, feeding themselves without fear; they are clouds without water, driven along by winds; trees of autumn, without fruit, twice dead, torn up by the roots: -

Treasury of Scripture Knowledge

Summary

But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

Bible References

Let

Matthew 21:22
And all things that you ask for in prayer, believing, you shall receive.
Mark 11:22
And Jesus answered and said to them: Have faith in God.
1 Timothy 2:8
I will, therefore, that the men pray everywhere, lifting up holy hands without wrath and disputation.
Hebrews 11:6
But without faith it is impossible to please him; for he that comes to God must believe that he is, and that he is a rewarder of those who diligently seek him.

He

Ephesians 4:14
that we might no longer be children, tossed and carried about by every wind of teaching, through the artifice of men, through craftiness used by them for the deliberate planning of deceit;
Hebrews 10:23
let us hold fast the unwavering confession of our hope, for he is faithful who has promised;
Hebrews 13:9
Be not carried away by various and strange teachings: for it is good that the heart be strengthened with grace, not with meats, which have not profited those who were occupied with them.
2 Peter 2:17
These men are fountains without water, clouds driven by a tempest, for whom the gloom of darkness is reserved forever.
Jude 1:12
These, while feasting with you, are- spots in your love-feasts, feeding themselves without fear; they are clouds without water, driven along by winds; trees of autumn, without fruit, twice dead, torn up by the roots: -