Abu Nasr Sa'd of Granada

Abu Nasr Sa'd ibn Ali ibn Yusuf (أبو نصر سعد بن علي بن يوسف), known by the regnal name al-Musta'in bi-llah (المستعين بالله) and as Ciriza (a corruption of Sidi Sa'd) or Mulay Zad ("Lord Sa'd) to the Christian chroniclers, was the twentieth Nasrid ruler of the Moorish Emirate of Granada in Al-Andalus on the Iberian Peninsula.