2 Corinthians 3:5

not that of ourselves we are competent to decide anything by our own reasonings, but our competency comes from God.

1 Corinthians 15:10

But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.

Matthew 10:19-20

But when they have delivered you up, have no anxiety as to how you shall speak or what you shall say; for at that very time it shall be given you what to say;

Luke 21:15

for I will give you utterance and wisdom which none of your opponents will be able to withstand or reply to.

Luke 24:49

And remember that I am about to send out my Father's promised gift to rest upon you. But, as for you, wait patiently in the city until you are clothed with power from on high."

John 15:5

I am the Vine, you are the branches. He who continues in me and in whom I continue bears abundant fruit, for apart from me you can do nothing.

1 Corinthians 3:6

I planted and Apollos watered; but it was God who was, all the time, giving the increase.

1 Corinthians 3:10

In discharge of the task which God graciously entrusted to me, I--like a competent master-builder--have laid a foundation, and others are building upon it. But let every one be careful how and what he builds.

2 Corinthians 2:16

to the last-named an odor of death predictive of death, and to the others an odor of life predictive of life. And for such service as this who is competent?

2 Corinthians 4:7

But we have this treasure in a fragile vase of clay, in order that the surpassing greatness of the power may be seen to belong to God, and not to originate in us.

2 Corinthians 12:9

but His reply has been, "My grace suffices for you, for power matures in weakness." Most gladly therefore will I boast of my infirmities rather than complain of them--in order that Christ's power may overshadow me.

Philippians 2:13

For it is God Himself whose power creates within you the desire to do His gracious will and also brings about the accomplishment of the desire.

Philippians 4:13

I have strength for anything through Him who gives me power.

James 1:17

Every gift which is good, and every perfect boon, is from above, and comes down from the Father, who is the source of all Light. In Him there is no variation nor the slightest suggestion of change.

Treasury of Scripture Knowledge

Summary

Not that we are sufficient of ourselves to think any thing as of ourselves; but our sufficiency is of God;

Bible References

But

2 Corinthians 12:9
but His reply has been, "My grace suffices for you, for power matures in weakness." Most gladly therefore will I boast of my infirmities rather than complain of them--in order that Christ's power may overshadow me.
Matthew 10:19
But when they have delivered you up, have no anxiety as to how you shall speak or what you shall say; for at that very time it shall be given you what to say;
Luke 21:15
for I will give you utterance and wisdom which none of your opponents will be able to withstand or reply to.
Luke 24:49
And remember that I am about to send out my Father's promised gift to rest upon you. But, as for you, wait patiently in the city until you are clothed with power from on high."
1 Corinthians 3:6
I planted and Apollos watered; but it was God who was, all the time, giving the increase.
1 Corinthians 15:10
But what I am I am by the grace of God, and His grace bestowed upon me did not prove ineffectual. But I labored more strenuously than all the rest--yet it was not I, but God's grace working with me.
Philippians 2:13
For it is God Himself whose power creates within you the desire to do His gracious will and also brings about the accomplishment of the desire.
Philippians 4:13
I have strength for anything through Him who gives me power.
James 1:17
Every gift which is good, and every perfect boon, is from above, and comes down from the Father, who is the source of all Light. In Him there is no variation nor the slightest suggestion of change.