Treaty of Hudaybiyyah
The Pledge of the Tree ( "bayʻat ash-shajarah") or Pledge of Satisfaction (Arabic: "bayʻat ar-riḍwān") or Pledge of Ridwan was a pledge that was sworn to the Islamic prophet Muhammad by his "Sahaba" (companions) prior to the Treaty of Hudaybiyyah (6 AH, 628 CE). The pledge, sworn under a tree, was to avenge the rumoured death of Uthman bin Affan.