1 Corinthians 4:20

for the Kingdom of God is not in word, but in power.

1 Corinthians 2:4

And my speech and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power;

2 Corinthians 10:4-5

(for the weapons of our warfare are not fleshly, but mighty through God for the casting down of strongholds);

Romans 14:17

for the Kingdom of God is not food and drink, but righteousness and peace and joy in the Holy Spirit.

1 Corinthians 1:24

but to those who are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.

1 Thessalonians 1:5

because our Gospel came not to you in word only, but also in power, and in the Holy Spirit, and in much assurance; even as ye know what manner of men we became toward you, for your sake.

Romans 1:16

For I am not ashamed of the Gospel; for it is the power of God unto salvation to every one that believes; to the Jew first, and also to the Greek

Romans 15:19

in the power of signs and wonders, in the power of the Holy Spirit; so that from Jerusalem and around as far as Illyricum, I have fully dispensed 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
but to those who are called, both Jews and Greeks, Christ the power of God, and the wisdom of God.
1 Corinthians 2:4
And my speech and my preaching were not in persuasive words of wisdom, but in demonstration of the Spirit and of power;
Romans 1:16
For I am not ashamed of the Gospel; for it is the power of God unto salvation to every one that believes; to the Jew first, and also to the Greek
Romans 14:17
for the Kingdom of God is not food and drink, but righteousness and peace and joy in the Holy Spirit.
Romans 15:19
in the power of signs and wonders, in the power of the Holy Spirit; so that from Jerusalem and around as far as Illyricum, I have fully dispensed the Gospel of Christ;
2 Corinthians 10:4
(for the weapons of our warfare are not fleshly, but mighty through God for the casting down of strongholds);
1 Thessalonians 1:5
because our Gospel came not to you in word only, but also in power, and in the Holy Spirit, and in much assurance; even as ye know what manner of men we became toward you, for your sake.