Romans 4:21

being fully convinced that God was able to do what he had promised.

Hebrews 11:19

He considered that God was able to raise men even from the dead; from which, figuratively speaking, he did receive him back.

2 Timothy 1:12

For this reason I also suffer as I do. But I am not ashamed, for I know whom I have believed and I am convinced that he is able to guard what I have entrusted to him until that day.

Matthew 19:26

But Jesus looked at them and said to them, "With men this is impossible, but with God all things are possible."

Luke 1:37

For with God nothing will be impossible."

Luke 1:45

And blessed is she who believed that there would be a fulfillment of what was spoken to her from the Lord."

Romans 8:38

For I am persuaded that neither death nor life, nor angels nor principalities, nor things present nor things to come, nor powers,

Romans 14:4

Who are you to judge the servant of another? To his own master he stands or falls. And he will be made to stand, for the Master is able to make him stand.

2 Corinthians 9:8

And God is able to make all grace abound toward you, so that you, always having all sufficiency in everything, may have an abundance for every good work.

Hebrews 11:13

These all died in faith, not having received the promises, but having seen them and greeted them from a distance, and having acknowledged that they were strangers and exiles on the earth.

Treasury of Scripture Knowledge

Summary

And being fully persuaded that, what he had promised, he was able also to perform.

Bible References

Fully

Romans 8:38
For I am persuaded that neither death nor life, nor angels nor principalities, nor things present nor things to come, nor powers,
2 Timothy 1:12
For this reason I also suffer as I do. But I am not ashamed, for I know whom I have believed and I am convinced that he is able to guard what I have entrusted to him until that day.
Hebrews 11:13
These all died in faith, not having received the promises, but having seen them and greeted them from a distance, and having acknowledged that they were strangers and exiles on the earth.

He was able

Romans 14:4
Who are you to judge the servant of another? To his own master he stands or falls. And he will be made to stand, for the Master is able to make him stand.
Matthew 19:26
But Jesus looked at them and said to them, "With men this is impossible, but with God all things are possible."
Luke 1:37
For with God nothing will be impossible."
2 Corinthians 9:8
And God is able to make all grace abound toward you, so that you, always having all sufficiency in everything, may have an abundance for every good work.
Hebrews 11:19
He considered that God was able to raise men even from the dead; from which, figuratively speaking, he did receive him back.