'It is Written' in the Bible

as it is written in Isaiah the prophet: "Lo! I send my messenger before thy face, who shall prepare thy way;"

And he said to them, Well did Isaiah prophesy of you hypocrites, as it is written, "This people honoreth me with their lips, but their heart is far from me.

And Jesus saith to them, Ye will all fall away from me; for it is written, "I will smite the shepherd, and the sheep will be scattered."