Romans 3:3

For what, if some did disbelieve? Shall their disbelief make void the faithfulness of God?

Hebrews 4:2

For, indeed, we have had the Gospel proclaimed to us, even as also they; but the word which they heard did not profit them, not having been mingled with faith on the part of those who heard.

Romans 10:16

But they did not all obey the glad tidings. For Isaiah says, "Lord, who believed our report?"

2 Timothy 2:13

if we are faithless, He remaineth faithful, for He cannot deny Himself.

Romans 9:6

But it is not as though the word of God has failed: for they are not all Israel, who are of Israel;

Matthew 24:35

The heaven and the earth will pass away, but My words shall not pass away.

John 1:16

because out of His fulness we all received, and grace for grace:

Romans 11:1-7

I say, then, did God cast off His people? It could not be! For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.

Romans 11:29

for the gifts and calling of God are not repented of.

2 Corinthians 3:18

But we all, with unveiled face, reflecting as a mirror the glory of the Lord, are transfigured into the same image from glory to glory, even as by the Spirit of the Lord.

2 Thessalonians 1:3

We ought to thank God always for you, brethren, as it is meet, because your faith is growing exceedingly, and the love of each one of you abounds toward one another;

Titus 1:1-2

Paul, a slave of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the full knowledge of the truth which is according to godliness,

Hebrews 6:13-18

For God, when making a promise to Abraham, since He had no one greater by whom to swear, swore by Himself,

Treasury of Scripture Knowledge

Summary

For what if some did not believe? shall their unbelief make the faith of God without effect?

General references

Bible References

If some

Romans 9:6
But it is not as though the word of God has failed: for they are not all Israel, who are of Israel;
Romans 10:16
But they did not all obey the glad tidings. For Isaiah says, "Lord, who believed our report?"
Romans 11:1
I say, then, did God cast off His people? It could not be! For I also am an Israelite, of the seed of Abraham, of the tribe of Benjamin.
Hebrews 4:2
For, indeed, we have had the Gospel proclaimed to us, even as also they; but the word which they heard did not profit them, not having been mingled with faith on the part of those who heard.

Shall

Romans 11:29
for the gifts and calling of God are not repented of.
Matthew 24:35
The heaven and the earth will pass away, but My words shall not pass away.
2 Timothy 2:13
if we are faithless, He remaineth faithful, for He cannot deny Himself.
Hebrews 6:13
For God, when making a promise to Abraham, since He had no one greater by whom to swear, swore by Himself,

Faith

John 1:16
because out of His fulness we all received, and grace for grace:
2 Corinthians 3:18
But we all, with unveiled face, reflecting as a mirror the glory of the Lord, are transfigured into the same image from glory to glory, even as by the Spirit of the Lord.
2 Thessalonians 1:3
We ought to thank God always for you, brethren, as it is meet, because your faith is growing exceedingly, and the love of each one of you abounds toward one another;
Titus 1:1
Paul, a slave of God, and an apostle of Jesus Christ, according to the faith of God's elect, and the full knowledge of the truth which is according to godliness,

General references

Acts 28:24
And some were believing the things spoken, and some were disbelieving.