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Cf. 81:23 and the corresponding note [8]. According to the Qur'an and the testimony of authentic Traditions, the Prophet had no more than twice in his lifetime a vision of this angelic force "manifested in its true shape and nature" (which, as pointed out by Zamakhshari, is the meaning of the expression istawa in this context): once after the period called fatrat al-wahy (see introductory note to surah {74}), and another time, as alluded to in verses {13-18}, in the course of his mystic vision known as the "Ascension" (see Appendix IV).
Gabriel appeared in stately form. Istawa in verse 61 translated "appeared", means literally "mounted" or "ascended", or "set himself to execute a design"; see n. 1386 to x. 3.