John 5:31

If I gave witness about myself, my witness would not be true.

John 8:13-14

So the Pharisees said to him, The witness you give is about yourself: your witness is not true.

John 8:54

Jesus said in answer, If I take glory for myself, my glory is nothing: it is my Father who gives me glory, of whom you say that he is your God.

Proverbs 27:2

Let another man give you praise, and not your mouth; one who is strange to you, and not your lips.

Revelation 3:14

And to the angel of the church in Laodicea say: These things says the true and certain witness, the head of God's new order:

Treasury of Scripture Knowledge did not add

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain