Abu Dawud Book 36, Hadith Number 4945.
Chapter : Not known.
Narated By AbuMas’ud or Hudhayfah : AbuMas’ud asked Abdullah, or AbuAbdullah asked AbuMas’ud: What did you hear the Apostle of Allah (PBUH) say about za’amu (they alleged, asserted, or it is said). He replied: I heard the Apostle of Allah (PBUH) say: It is a bad riding-beast for a man (to say) za’amu (they asserted).