1 Corinthians 4:20

for the kingdom of God consisteth not in speech, but in power.

1 Corinthians 2:4

And my discourse, and my preaching was not with the persuasive words of human wisdom, but in the demonstration of the Spirit and of power;

2 Corinthians 10:4-5

(for the weapons of our warfare are not carnal, but mighty through God to the demolishing of bulwarks:)

Romans 14:17

but in righteousness and peace, and joy in the holy Ghost: for he,

1 Corinthians 1:24

both Jews and Greeks, Christ the power of God and the wisdom of God.

1 Thessalonians 1:5

For our gospel came not to you in word only, but also in power, and in the holy Ghost, and in much certainty; as ye know what sort of persons we were among you for your sakes.

Romans 1:16

For I am not ashamed of the gospel of Christ; for it is the power of God unto salvation to every one that believeth, both Jew and Greek:

Romans 15:19

through the efficacy of signs and wonders, by the power of the Spirit of God; so that from Jerusalem, and round as far as to Illyricum, I have fully declared the gospel of Christ:

Treasury of Scripture Knowledge

Summary

For the kingdom of God is not in word, but in power.

Bible References

General references

1 Corinthians 1:24
both Jews and Greeks, Christ the power of God and the wisdom of God.
1 Corinthians 2:4
And my discourse, and my preaching was not with the persuasive words of human wisdom, but in the demonstration of the Spirit and of power;
Romans 1:16
For I am not ashamed of the gospel of Christ; for it is the power of God unto salvation to every one that believeth, both Jew and Greek:
Romans 14:17
but in righteousness and peace, and joy in the holy Ghost: for he,
Romans 15:19
through the efficacy of signs and wonders, by the power of the Spirit of God; so that from Jerusalem, and round as far as to Illyricum, I have fully declared the gospel of Christ:
2 Corinthians 10:4
(for the weapons of our warfare are not carnal, but mighty through God to the demolishing of bulwarks:)
1 Thessalonians 1:5
For our gospel came not to you in word only, but also in power, and in the holy Ghost, and in much certainty; as ye know what sort of persons we were among you for your sakes.