It was recorded by Muslim and others. (The second additional wording is found in al-Nasai, transmitted through Ibn Rahuyah’s Musnad, 4/129/2, and is also cited in Sahih Abi Dawud, no. 823.) Al-Nasai classifies it under two headings: (1) “Setting the feet upright in prostration” and (2) “Supplication while prostrating.” The text with its documentation will be quoted later [p. 769]. (1) A report from Saʿd ibn Abi Waqqas states that the Prophet ﷺ commanded placing the hands down and setting the feet upright. It is related by al-Tirmidhi (2/67), al-Hakim (1/271) and al-Bayhaqi (2/107) through the chain: Wahib → Muhammad ibn ʿAjlan → Muhammad ibn Ibrahim → ʿAmir ibn Saʿd → his father. Al-Hakim judged it “sound according to Muslim’s criterion,” and al-Dhahabi agreed, but in fact it is merely hasan. Al-Tirmidhi noted that Yahya ibn Saʿid al-Qattan and other trustworthy transmitters narrated it from Muhammad ibn ʿAjlan → Muhammad ibn Ibrahim → ʿAmir ibn Saʿd without the phrase “from his father,” adding: “This version is more authentic than Wahib’s.” I respond: this is not a harmful defect, for Wahib ibn Khalid al-Bahili is reliable and firmly established—as al-ʿAjli affirmed—and both Bukhari and Muslim used him as evidence. His mentioning Saʿd constitutes an addition by a trustworthy narrator and must therefore be accepted. [Al-Siraj also recorded it.] (2) Reported by Abu Dawud, al-Tirmidhi (who graded it sahih), al-Nasai and Ibn Majah. The verb yaftakh, with a dotted kha, means “to loosen them so that they bend, turning their tips toward the qibla” (al-Maʿalim, 1/169). (3) Another narration from ʿAishah states: “I missed the Messenger of Allah ﷺ while he was with me on the bed, and I found him prostrating with his heels pressed together …”