Nahj al-balāgha (Arabic: نَهْج ٱلْبَلَاغَة, lit. 'the path of eloquence') is the best-known collection of sermons, letters, and sayings attributed to Ali ibn Abi Talib (d. 661), the fourth Rashidun caliph (r. 656–661), the first Shia imam, and the cousin and son-in-law of the Islamic prophetMuhammad. The compilation of the book is often credited to Sharif al-Radi (d. 1015), a prominent Shia scholar.[1][2] Known for its moral aphorisms and eloquent content, Nahj al-balagha is widely studied in the Islamic world and has considerably influenced the Arabic literature and rhetoric.[1][3] In view of its sometimes sensitive content, the authenticity of the book has long been a subject of polemic debates, though recent academic research suggests that most of its contents can indeed be attributed to Ali by tracking the texts in sources that predate al-Radi.[1][4]