'Shackles' in the Bible

because he had often been bound with shackles and chains, and the chains had been torn apart by him, and the shackles had been shattered. And no one was strong [enough] to subdue him.

For he had commanded the unclean spirit to come out of the man. (For it had seized him many times, and he was bound with chains and shackles [and] was guarded, and breaking the bonds he would be driven by the demon into the deserted places.)