John 8:14

Jesus answered and said to them: Though I testify concerning myself, my testimony is worthy of credit; for I know whence I came, and whither I go. But you know not whence I came, and whither I go.

John 1:17

for the law was given through Moses, but the grace and the truth came through Jesus Christ.

John 8:45-46

But because I speak the truth, you believe me not.

John 14:6

Jesus said to him: I am the way, and the truth, and the life; no one comes to the Father, but through me.

John 17:17

Sanctify them through thy truth; thy word is truth.

John 18:37

Then Pilate said to him: You are a king, then? Jesus answered; You say that I am a king. For this purpose was I born, and for this purpose I came into the world, that I might testify to the truth. Every one that is of the truth, hears my voice.

Revelation 3:14

And to the angel of the church in Laodicea, write: These things says the Amen, the faithful and true witness, the beginning of the creation of God;

Treasury of Scripture Knowledge

Summary

For my mouth shall speak truth; and wickedness is an abomination to my lips.

Bible References

My mouth

John 1:17
for the law was given through Moses, but the grace and the truth came through Jesus Christ.
John 8:14
Jesus answered and said to them: Though I testify concerning myself, my testimony is worthy of credit; for I know whence I came, and whither I go. But you know not whence I came, and whither I go.
John 14:6
Jesus said to him: I am the way, and the truth, and the life; no one comes to the Father, but through me.
John 17:17
Sanctify them through thy truth; thy word is truth.
John 18:37
Then Pilate said to him: You are a king, then? Jesus answered; You say that I am a king. For this purpose was I born, and for this purpose I came into the world, that I might testify to the truth. Every one that is of the truth, hears my voice.
Revelation 3:14
And to the angel of the church in Laodicea, write: These things says the Amen, the faithful and true witness, the beginning of the creation of God;