'Power' in the Bible

The feet of His saints He keepeth, And the wicked in darkness are silent, For not by power doth man become mighty.

And Saul hasteth and falleth -- the fulness of his stature -- to the earth, and feareth greatly because of the words of Samuel; also power was not in him, for he had not eaten bread all the day, and all the night.

and now, hearken, I pray thee, also thou, to the voice of thy maid-servant, and I set before thee a morsel of bread, and eat, and there is in thee power when thou goest in the way.'

And David lifteth up -- and the people who are with him -- their voice and weep, till that they have no power to weep.