It is not always possible to distinguish the between sambu and sambue as both can gloss Latin sambuca. Sambu ultimately derives from a Greek etymon, while sambue is Germanic in origin.
s.
1equit. saddle, or saddle-cloth, specifically for a small riding horse for a woman:
(
s.xii3/4; MS: s.xiv2
)
Cleopatras chevache un[e] mule kernue Plus blanche qe n'est neif, de fin or la sambue
716
sambue (s.xii3/4)