(The) of the Nibelungs was of pure gold. Whoever had it could keep the whole world in subjection. It belonged to Siegfried, but when the “Nibelung hoard” was removed to Worms this rod went also.
And there among was lying the wishing-rod of gold, Which whoso could discover might in subjection hold All this wide world as master, with all that dwell therein.
Lettsom's Nibelungen-Lied, st. 1160.
Source: Dictionary of Phrase and Fable, E. Cobham Brewer, 1894