Ally of B. Asad.
He was sent by Muhammad with a letter to Muqawqis, an Egyptian Coptic Christian official. He returned with gifts, including two slaves, Maria al-Qibtiyya and her sister Sirin. Muhammad took Maria as his wife.
A veteran of the Battle of Badr, it was discovered that he had sent a secret letter to the Quraish detailing Muhammad's movements. When confronted, he begged mercy explaining that he had only hoped the powerful tribe would help protect his family in return. While Umar ibn Khattab sought the Prophet's permission to kill Balta'ah, Muhammad said that it was unnecessary, as God has forgiven all veterans of Badr, and knew the sincerity of his heart. The following was revealed after the incident:
"O you who believe! Take not My enemies and your enemies as protecting friends showing affection towards them, while they have disbelieved in what has come to you of the truth....". [60:1]