 During this period, four descendants of Iltutmish were put on the throne and murdered.In the 1220s, Iltutmish had groomed his eldest son "Malikus Sa'id" Nasiruddin Mahmud as his successor, but Nasiruddin died unexpectedly in 1229.While leaving for his Gwalior campaign in 1231, Iltutmish had left Delhi's administration to his daughter Razia.