Qad ʻaraftu fīmā salaf min aqāwīlinā al-farq bayna al-ʻalāmah wa-al-ʻarḍ wa-qad ʻaraftu anna al-ʻalāmah yakūnu lil-ṣiḥḥah wa-al-ʻarḍ lā yakūn...

by Maḥmūd ibn Masʻūd Quṭb al-Shīrāzī, Harvard College Library