The Introduction of the Green Mark on the Turbans of the Ashraf

Al-Suyuti, in "History of the Caliphs", reports that in 773 AH the green sign was introduced on the turbans of the Sharifs so that they would be distinguished, by order of the sultan, and that this was the first thing of its kind introduced. ²

He gives verses by Abu Abd Allah ibn Jabir the blind grammarian, author of a commentary on the Alfiyya, in which he says that the sign is for one who is not well known, and that the light of prophethood on their faces makes the noble man free of the green badge. ²