The Nahj al-Balagha (نهج البلاغة‎ Nahj-ul Balāgha(h), "The Peak or Way of Eloquence") is the most famous collection of sermons, letters, and sayings attributed to Ali, cousin and son-in-law of Muhammad. It was collected by Sharif al-Razi, a Shia scholar in the 10th century CE (4th century AH). Known for its eloquent content, it is considered a masterpiece of literature in Islam.