According to the Arab historian Abu ʿUbaidah ( 824), Khosrow II was angry with the king, al-Nu'man III ibn al-Mundhir, for refusing to give him his daughter in marriage, and therefore imprisoned him. Subsequently, Khosrow sent troops to recover the Nu'man family armor, but Hani ibn Mas'ud (Nu'man's friend) refused, and the Arab forces of the Sasanian Empire were annihilated at the Battle of Dhi Qar, near al-Hirah, the capital of the Lakhmids, in 609. Hira stood just south of what is now the Iraqi city of Kufa.