الجهاد والسير : Hadeeth No:4292
Ibn 'Aun reported: I wrote to Nafi' inquiring from him whether it was necessary to extend (to the disbelievers) an invitation to accept (Islam) before m". ing them in fight. He wrote (in reply) to me that it was necessary in the early days of Islam. The Messenger of Allaah (sallAllaahu alayhi wa sal...