'Deceitful' in the Bible

Why has my pain been perpetualAnd my wound incurable, refusing to be healed?Will you indeed be to me like a deceptive brookWith water that is unreliable?

“The heart is deceitful above all thingsAnd it is extremely sick;Who can understand it fully and know its secret motives?

Hear this, I am against the prophets,” says the Lord, “who use their [own deceitful] tongues and say, ‘Thus says the Lord.’