Harbi al-Himyari
Ḥarbī al-Ḥimyarī is a semi-legendary Himyarite sage who appears several times in the writings attributed to the Islamic alchemist Jābir ibn Ḥayyān. He is said there to have been one of Jabir's teachers, and to have been 463 years old when Jabir met him. One of Jabir's lost works was dedicated to Harbi al-Himyari's contributions to alchemy, a fact which may point to the existence in Jabir's time of a written work attributed to him.