The Epistle to the Son of the Wolf is the last major work of Baháʼu'lláh, founder of the Baháʼí Faith, written in 1891 just before his death in 1892. It is a letter written to "the son of the Wolf," Shaykh Muhammad Taqi known as Áqá Najafi (1846-1914),: 281  a Muslim cleric in Isfáhán, where his family was the most powerful clerical family. Baháʼu'lláh called the father, Shaykh Muhammad Báqir (1819-1883), the Wolf because of his responsibility for the execution of the Nahrí brothers in Isfahan in 1879. The father and son were known for their persecution of the Baháʼís. Source: Wikipedia (en)