Definition of "heben"

And thou moſt dreaded impe of higheſt Ioue, / Faire Venus ſonne, that with thy cruell dart / At that good knight ſo cunningly didſt rove, / That glorious fire it kindled in his heart, / Lay now thy deadly Heben bow apart, / And with thy mother milde come to my ayde: […]

1590, Edmund Spenser, “Book I”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, stanza 3, page 2