'Powerless' in the Bible

What -- thou hast helped the powerless, Saved an arm not strong!

In the shadow of Heshbon stood powerless have fugitives, For fire hath gone forth from Heshbon, And a flame from within Sihon, And it consumeth the corner of Moab, And the crown of the sons of Shaon.

And go out from the daughter of Zion doth all her honour, Her princes have been as harts -- They have not found pasture, And they go powerless before a pursuer.