'Strength' in the Bible

For he had often been bound with shackles [for the feet] and with chains, and he tore apart the chains and broke the shackles into pieces, and no one was strong enough to subdue and tame him.

and you shall love the Lord your God with all your heart, and with all your soul (life), and with all your mind (thought, understanding), and with all your strength.’

and to love Him with all the heart and with all the understanding and with all the strength, and to [unselfishly] love one’s neighbor as oneself, is much more than all burnt offerings and sacrifices.”

And He came back and found them sleeping, and He said to Peter, “Simon, are you asleep? Were you unable to keep watch for one hour?