Devâtî (Divitçi) Mustafa Efendi (d. 1070/1660) was a seventeenth-century Jelveti sheikh known by this epithet because he manufactured inkwells (divit). He completed his spiritual training under Muk'ad Ahmed Efendi at the Hüdâyî lodge in Üsküdar and, after receiving his licence, taught at various madrasas. In 1657 he converted the mosque of Arslan Ağazâde Mustafa Bey in Üsküdar into a lodge and began his guidance activity, dying about three years later. He left a work of mystical observations titled Tuhfetü's-sûfiyyîn, and his tomb stands in the courtyard cemetery of the mosque at Sultantepe.