'True and Faithful' in the Bible

Then they said to Jeremiah, The LORD be a true and faithful witness between us, if we do not even according to all things for the which the LORD thy God shall send thee to us.

"And to the minister of the Church at Laodicea write as follows: "'This is what the Amen says--the true and faithful witness, the Beginning and Lord of God's Creation.

And he that sat upon the throne said, Behold, I make all things new. And he said unto me, Write: for these words are true and faithful.