Abu Nasr Sa'd of Granada

Abu Nasr Sa'd (1398–1465) was the twentieth Nasrid ruler of the Emirate of Granada on the Iberian Peninsula. He was known by the regnal nameal-Musta'in bi-llah ("he who looks for help to God") and as Ciriza (a corruption of Sidi Sa'd) or Mulay Zad ("Lord Sa'd") to contemporary Christian chroniclers.

Sa'd reigned during a period of intense political instability marked by dynastic conflict and pressure from Castile. A grandson of Yusuf II and descendant of Muhammad V, he emerged as a leading contender for the throne after the death of Muhammad IX. Backed by factions within Granada and later by the Castilian king Enrique IV, Sa'd briefly seized power in 1454, though he was soon displaced by Muhammad X. With continued support, he regained the throne in 1455 and ruled for most of the following seven years.

His second reign was dominated by warfare with Castile, resulting in territorial losses and costly truces that required tribute payments, the release of captives, and the sale of royal lands. Economic decline and political tensions weakened his authority. His attempt to curb the powerful Abencerrajes family culminated in their violent suppression, further destabilizing the court.

In 1462 he was briefly overthrown by Ismail IV before regaining power. However, internal divisions persisted, and in 1464 his son Abu l-Hasan Ali deposed him. Sa'd spent his final year in Almeria, dying in 1465.