The Messenger of Allah ﷺ forbade two ways of wearing a garment, the Samma wrap, and sitting with one's knees drawn up in a single garment while one's private parts are exposed.
نهى رسول الله ﷺ عن لبستين: اشتمال الصماء، والاحتباء في ثوب واحد، وأنت مفض فرجك.
Ibn Majah (3561) narrated it from Abu Bakr bin Abu Shayba, and it is also in his Musannaf (25727), where he said, Abdullah bin Numayr and Abu Usama narrated to us from Saad bin Saeed, from Amra, from Ayesha, and he mentioned it.Its chain is hasan on account of Saad bin Saeed, who is the brother of Yahya bin Saeed. There is disagreement about him, as Ahmad, Ibn Main, Nasai, and others declared him daif, though he is among the narrators used by Muslim. Ibn Adi said, "He has sound hadiths."I say, if he has a basis for a hadith, then his hadith is judged hasan, and this is one of them.