'Shackles' in the Bible

because he often had been bound with shackles and chains, but had snapped off the chains and smashed the shackles. No one was strong enough to subdue him.

For He had commanded the unclean spirit to come out of the man. Many times it had seized him, and though he was guarded, bound by chains and shackles, he would snap the restraints and be driven by the demon into deserted places.

suddenly there was a great earthquake, so [powerful] that the very foundations of the prison were shaken and at once all the doors were opened and everyone’s chains were unfastened.

Wretched and miserable man that I am! Who will [rescue me and] set me free from this body of death [this corrupt, mortal existence]?