Nahjul Balagha (Peak of Eloquence)

the most famous collection of sermons, letters, tafsirs and narrations attributed to Ali, cousin and son-in-law of Muhammad. It was collected by Sharif Razi, a Shi'i scholar in the tenth century known for its eloquent content, it is considered a masterpiece of literature in Shi'a Islam, second only to the Qur'an and Prophetic narrations.