Ibn Rustah states that, while for other lands he had to depend on second-hand reports, often acquired with great difficulty and with no means of checking their veracity, for Isfahan he could use his own experience and observations or statements from others known to be reliable.
Ahmed ibn Rustah, perzijsko: احمد ابن رسته اصفهانی - Aḥmad ebn Roste Eṣfahānī, perzijski raziskovalec in geograf iz 10. stoletja, * 10. stoletje, Isfahan, Perzija, † ?.