I said, "Messenger of Allah, I am a man who hunts. May I pray in a single shirt?"He replied, "Yes, but button it up, even if only with a thorn."
قلت يا رسول الله، إني رجل أصيد أفأصلي في القميص الواحد؟ قال: نعم وازرزه ولو بشوكة.
Abu Dawud (632) and Nasai (766) both narrated it through Musa bin Ibrahim, from Salama bin Akwa, and he mentioned the same. Its chain is hasan because of Musa bin Ibrahim, who is Ibn Abdul-Rahman bin Abu Rabia Makhzumi. Some critics confused him with Musa bin Muhammad bin Ibrahim, about whom Abu Dawud said "daif," and whom Ahmad disliked narrating from.As for this Musa bin Ibrahim Makhzumi, no one has reported that he was graded daif. Rather, Ibn Madini said about him, "average," and Ibn Hibban deemed him trustworthy. Both he and his teacher Ibn Khuzayma included his hadith in their two Sahihs, Ibn Khuzayma (777, 778), and Ibn Hibban (2294). Hakim said (1/250), "This is a sahih Madinan hadith, for Musa is Ibn Ibrahim bin Abdullah Makhzumi."Ibn Khuzayma said, "This Musa bin Ibrahim is Ibn Abdul-Rahman bin Abdullah Ibn Abu Rabia. I think he is Ibn Ibrahim bin Abdullah bin Abdul-Rahman bin Muammar bin Abu Rabia, whose father Ibrahim is the one mentioned by Shurahbil bin Saad, that he entered, along with Ibrahim bin Abdullah bin Abdul-Rahman bin Muammar bin Abu Rabia, upon Jabir bin Abdullah, in a lengthy hadith he related." End of quotation.Nawawi also graded it hasan in Al-Majmu (3/175), and in Al-Khulasa (1/328). Musa bin Ibrahim explicitly stated that he heard it from Salama bin Akwa, as recorded by Hakim in Al-Mustadrak (1/250). What Tahawi narrated (1/380) through Musa bin Muhammad bin Ibrahim, from his father, from Salama bin Akwa, does not affect what has been established as sahih, for it contains an error in two places. The first is his saying "Musa bin Muhammad bin Ibrahim," which is something that confused some narrators. The second is his saying "from his father," whereas it has been established, as I said, that Musa bin Ibrahim heard directly from Salama bin Akwa, without an intermediary.His saying "and fasten it," and in another version, "and button it," means tying its collar so that your private parts would not be exposed.As for what was narrated from Ibn Umar, that he used to pray with his waist-wrap untied, and said, "I saw the Messenger of Allah ﷺ do that," this is very daif.Ibn Khuzayma (779) and Hakim (1/250), and from him Bayhaqi (2/240), narrated it through Walid bin Muslim, who said, Zuhayr bin Muhammad Tamimi told us, Zayd bin Aslam told us, he said, "I saw Ibn Umar praying with his waist-wrap untied, so I asked him about that, and he said," and then he related it.Bayhaqi said, "Zuhayr bin Muhammad narrated it alone." It has reached me that Abu Isa Tirmidhi said, "I asked Muhammad," meaning Bukhari, "about this hadith of Zuhayr's," and he said, "I am wary of this shaykh, as though his hadith were fabricated, and this is not, in my view, Zuhayr bin Muhammad." Ahmad bin Hanbal used to declare this shaykh daif, and would say, "This is a shaykh whose name they must have altered."I say, Zuhayr bin Muhammad is Tamimi, Abu Mundhir Khurasani, who settled in Syria and then in Hijaz. The narration of the people of Syria from him is not sound, and he was graded daif on that account. Walid bin Muslim, who narrated from him, was among the Syrians.