THE HOLY BIBLE Authorized King James

1 Corinthians (Author Paul)

2:4And my speech and my preaching was not with enticing words of man's wisdom, but in demonstration of the Spirit and of power:

1 Thessalonians (Author Paul)

1:5For our gospel came not unto you in word only, but also in power, and in the Holy Ghost, and in much assurance; as ye know what manner of men we were among you for your sake.

Original from The Bible Foundation - They claim public domain status for their original text.