As for al-Dhahabi, he said after it: “Abu al-Munib, ‘Ubayd Allah, was deemed strong by Abu Hatim, and al-Nasa’i relied upon him.” The hadith is authentic, for its contents have been transmitted separately in other hadiths:
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Sitting between shade and sunlight. There are hadiths concerning this from Abu Hurayrah and others; I have cited some of them earlier under (837), (838), and (3110).
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Drawing up one’s legs inside a garment. There are hadiths concerning this from Abu Sa‘id and Abu Hurayrah in the two Sahihs, and from ‘A’ishah in Ibn Majah and elsewhere.
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Praying in a garment without wrapping it around oneself.
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Praying in trousers without a cloak.
Regarding the latter two, there is the hadith of Buraydah: “He forbade praying in a blanket that is not wrapped around one’s body, and praying in trousers when one is not wearing a cloak.” This portion was also narrated by Abu Dawud and others in the hadith of Buraydah, and is cited in Sahih Abi Dawud (646).
Al-Khatib (5/138) narrated, through the route of al-Husayn ibn Waqid—the original text mistakenly reads: Wardan!—from Abu al-Zubayr, from Jabir, that the Prophet, peace and blessings be upon him, forbade praying in trousers. It is cited in al-Da‘ifah (4721).
Al-Khatib also narrated from Abu Bakr al-Naysaburi that he said: “The legal purport of this hadith is that the Prophet, peace and blessings be upon him, forbade praying in trousers alone.”