'Fastened' in the Bible

The very night before Herod was to bring him forward, Peter was sleeping between two soldiers, bound with two chains, and sentries were in front of the door guarding the prison.

He, having received such a [strict] command, threw them into the inner prison (dungeon) and fastened their feet in the stocks [in an agonizing position].

But when Paul had gathered a bundle of sticks and laid them on the fire, a viper crawled out because of the heat and fastened itself on his hand.