<p style='text-align: justify;'>From a work on materia medica, presenting a list of simples under the letter hamza, including antimony (kohl), whose usefulness is corroborated with the words of the Prophet Muḥammad who reports that antimony sharpens vision and enhances hair growth (al-Tirmiḏī, Hadīṯ 4472 on the authority of Abū ʿAbbās).</p>