Bible Verses About Unbelief: Questioning the power of God

The servant on whose arm the king was leaning answered the man of God: "Why, this couldn't happen even if ADONAI made windows in heaven!" Elisha answered, "All right, you yourself will see it with your own eyes; but you won't eat any of it!"

Yes, they spoke against God by asking, "Can God spread a table in the desert?

True, he struck the rock, and water gushed out, until the vadis overflowed; but what about bread? Can he give that? Can he provide meat for his people?"