'Unreliable' in the Bible

Men are nothing but a mere breath; human beings are unreliable. When they are weighed in the scales, all of them together are lighter than air.

They fell away and were as disloyal as their ancestors. They became unreliable, like a defective bow;

You despise all who stray from your statutes, for they are deceptive and unreliable.

An unreliable messenger falls into trouble, but a faithful envoy brings healing.

Trusting an unreliable person in a difficult timeis like a rotten tooth or a faltering foot.

I will make justice the measuring line, fairness the plumb line; hail will sweep away the unreliable refuge, the floodwaters will overwhelm the hiding place.

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

"Then everyone living in Egypt will know that I am the LORD, because they have been an unreliable ally to the house of Israel.

They turn to Baal; they are like an unreliable bow. Their leaders will fall by the sword because their prayers to Baal have made me angry. So people will disdain them in the land of Egypt.

being a double-minded man, unstable and restless in all his ways [in everything he thinks, feels, or decides].