 According to historical sources, Ṯābit ibn Qurra (d. 901) might have revised the translation into Arabic of Themistius’ paraphrase of Metaphysics Lambda. More importantly, this author wrote the first known extant Arabic commentary on the Metaphysics, still glossed by Ibn Taymiyya (d. 1328) four centuries later, according to the method of concise exposition (talḫīṣ), i.e., isolating the most relevant points of the commented text. This commentary shares with al-Kindī’s works a special regard for the place of philosophical theology within metaphysics, since it focuses on book Lambda of Aristotle’s Metaphysics. Also Kindian is the effort to accommodate Islamic monotheism, by insisting on the oneness and willful action of God, and by adopting the Porphyrian theme of the harmony between Aristotle’s and Plato’s teaching. At variance with al-Kindī, by contrast, is Ṯābit’s endorsing of the doctrine of the eternity of the world, rather than its creation in time, against Philoponus, and the minimal reliance on Neoplatonic writings. The background of the commentary is decidedly Aristotelian, with some possible influence of the Peripatetic commentators (most notably Themistius, who however is never mentioned); nonetheless, Ṯābit revises some crucial tenets of Aristotle’s philosophical theology, by understanding, for example, the First Mover as the first cause not only of the motion of the universe, but also of its existence.