'Untrue' in the Bible

If I had said, “I will say this,” [and expressed my feelings],I would have betrayed the generation of Your children.

But their lips were false to him, and their tongues were untrue to him;

Their hearts were turned back and untrue like their fathers; they were turned to one side like a twisted bow.

I saw with hate those who were untrue to you; for they did not keep your saying.