Passage cross-references.

For Christ sent me not to baptize, but to preach the gospel: not with wisdom of words, lest the cross of Christ should be made of none effect.

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

Which things also we speak, not in the words which man’s wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.

And Moses said unto the LORD, O my LORD, I am not eloquent, neither heretofore, nor since thou hast spoken unto thy servant: but I am slow of speech, and of a slow tongue.

For they that are such serve not our Lord Jesus Christ, but their own belly; and by good words and fair speeches deceive the hearts of the simple.

Be not thou therefore ashamed of the testimony of our Lord, nor of me his prisoner: but be thou partaker of the afflictions of the gospel according to the power of God;

And this is the record, that God hath given to us eternal life, and this life is in his Son. …

Then said I, Ah, Lord GOD! behold, I cannot speak: for I am a child. …

But though I be rude in speech, yet not in knowledge; but we have been throughly made manifest among you in all things.

When he shall come to be glorified in his saints, and to be admired in all them that believe (because our testimony among you was believed) in that day.

To the law and to the testimony: if they speak not according to this word, it is because there is no light in them.

After these things Paul departed from Athens, and came to Corinth; …

Testifying both to the Jews, and also to the Greeks, repentance toward God, and faith toward our Lord Jesus Christ.

And saw him saying unto me, Make haste, and get thee quickly out of Jerusalem: for they will not receive thy testimony concerning me.

Even as the testimony of Christ was confirmed in you:

And we have seen and do testify that the Father sent the Son to be the Saviour of the world.

Who bare record of the word of God, and of the testimony of Jesus Christ, and of all things that he saw.

For his letters, say they, are weighty and powerful; but his bodily presence is weak, and his speech contemptible.

According to the glorious gospel of the blessed God, which was committed to my trust.

I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ.

And I fell at his feet to worship him. And he said unto me, See thou do it not: I am thy fellowservant, and of thy brethren that have the testimony of Jesus: worship God: for the testimony of Jesus is the spirit of prophecy.