r ▁suddenly ▁changed ▁his ▁mind ▁about ▁going ▁with ▁them . ▁Abd ul lah ▁perce ived ▁Us ay r ' s ▁bad ▁intention ▁as ▁the ▁latter ▁was ▁prepar ing ▁to ▁draw ▁his ▁sword . ▁So ▁Abd ul lah ▁r ushed ▁at ▁him ▁and ▁struck ▁him ▁with ▁his ▁sword ▁cutting ▁off ▁his ▁leg . ▁Us ay r ▁hit ▁Abd ul lah ▁with ▁a ▁stick ▁of ▁sh au hat ▁wood ▁which ▁he ▁had ▁in ▁his ▁hand ▁and ▁wounded ▁his ▁head . ▁All ▁Muhammad ' s ▁em iss aries ▁fell ▁upon ▁the ▁thirty ▁Jewish ▁compan ions ▁and ▁killed ▁them ▁except ▁one ▁man ▁who ▁escaped ▁on ▁his ▁feet . ▁Abd ul lah ▁bin ▁Un ays ▁is ▁the ▁assass in ▁who ▁volunte ered ▁and ▁got ▁permission ▁to ▁kill ▁Ban u ▁Nad ir ' s ▁S all am ▁ibn ▁Ab u ▁al - H u q ay q ▁at ▁a ▁previous ▁night ▁mission ▁in ▁Kh ay bar . ▁ ▁Many ▁sch ol ars ▁have ▁considered ▁the ▁above ▁mach in ations ▁of ▁the ▁Nad ir ▁as ▁a ▁reason ▁for ▁the ▁battle . ▁According ▁to ▁Mont gom ery ▁W att , ▁their ▁intr igu ing ▁and ▁use ▁of ▁their ▁wealth ▁to ▁in cite ▁tribes ▁against ▁Muhammad ▁left ▁him ▁no ▁choice ▁but ▁to ▁attack . ▁V ag lier i ▁conc urs ▁that ▁one ▁reason ▁for ▁attack ▁was ▁that ▁the ▁Jews ▁of ▁Kh ay bar ▁were ▁responsible ▁for ▁the ▁Confeder ates ▁that ▁attacked ▁Muslim s ▁during ▁the ▁Battle ▁of ▁the ▁T rench . ▁Sh ibli ▁Num ani ▁also ▁sees ▁Kh ay bar ' s