The Banu Sa'd (Arabic: بنو سعد / ALA-LC: Banū Saʾd) was one of the tribes of Arabia during Muhammad's era. The Banu Sa'd were a subgroup of the larger Hawazin tribal confederation. They were notable for being allies to the polytheist Meccans and warring with the Muslims during Islam's early days. Halima Sadia, Muhammad's wet nurse, belonged to this tribe.
- ^ Nicolle, David (2009). The great Islamic conquests AD 632-750 (1. publ. ed.). Oxford: Osprey. p. 19. ISBN 1846032733.