Mark 5:3-5

3He lived among the tombs; and no one was able to bind him anymore, not even with a chain,

4because he had often been bound with shackles and chains, and the chains had been torn apart by him and the shackles broken in pieces; and no one was strong enough to subdue him.

5Constantly, night and day, he was screaming among the tombs and in the mountains, and cutting himself with stones.