A short extant work on Ptolemaic astronomy dealing exclusively with the celestial realm. The work was translated into Latin by Gerard of Cremona at the end of the 12th century as Thebit Bencora De hiis que indigent expositione antequam legatur Almagesti (see David Juste, ‘Thebit Bencora, De hiis que indigent expositione antequam legatur Almagesti’ (update: 27.02.2022), Ptolemaeus Arabus et Latinus. Works, URL = http://ptolemaeus.badw.de/work/23). The work was also transliterated into Hebrew in the 15th century (see London, British Library Or 4104 below).