Most Relevant Verses
But some men from what was called the Synagogue of the Freedmen, including both Cyrenians and Alexandrians, and some from Cilicia and Asia, rose up and argued with Stephen. But they were unable to cope with the wisdom and the Spirit with which he was speaking.
For Christ did not send me to baptize, but to preach the gospel, not in cleverness of speech, so that the cross of Christ would not be made void.
Then Moses said to the LORD, "Please, Lord, I have never been eloquent, neither recently nor in time past, nor since You have spoken to Your servant; for I am slow of speech and slow of tongue."
More Verses on Eloquence
For speaking out arrogant words of vanity they entice by fleshly desires, by sensuality, those who barely escape from the ones who live in error,