John 5:31

If I alone bear witness about myself, my testimony is not deemed true.

John 8:13-14

So the Pharisees said to him, "You are bearing witness about yourself; your testimony is not true."

John 8:54

Jesus answered, "If I glorify myself, my glory is nothing. It is my Father who glorifies me, of whom you say, 'He is our God.'

Proverbs 27:2

Let another praise you, and not your own mouth; a stranger, and not your own lips.

Revelation 3:14

"And to the angel of the church in Laodicea write: 'The words of the Amen, the faithful and true witness, the beginning of God's creation.

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The Holy Bible, English Standard Version® copyright © 2001 by Crossway Bibles, a publishing ministry of Good News Publishers.