sentences:  Although the Banu 'Amir were engaged in a long war with the Quraysh before the appearance of Islam, the tribe was characterized by giving late allegiance to Muhammad and his immediate successors.The Banu Amir took part in the Ridda ("apostasy") following Muhammad's death, and instead allied themselves with the Apostates against the Muslims.During that period the tribe produced several well-known Arabic poets, the most famous of whom was Labid ibn Rabi'ah, an author of one of the Seven Hanged Poems.