The Prophet ﷺ had one of his wives stand up, and he measured out a span or two from the hem of her garment and said, "Do not add more than this."
أن النبي ﷺ أقام بعض نسائه، وشبر من ذيلها شبرا أو شبرين وقال: لا تزدن على هذا.
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Reported by Abu Yaala (3796) from Suwayd bin Saeed, who said, "Mutamir bin Sulayman narrated to us, from Humayd, from Anas," and he related it. Its chain is hasan, because of Suwayd bin Saeed, originally from Herat, who was truthful in himself, except that he went blind and began to be fed things that were not from his own hadith. The corroboration of Dirar bin Sard confirms that he did not err in this instance. This is what Tabarani related in al-Awsat, Majma al-Bahrayn (4250), from Muhammad bin Muhammad Tammar, who said, "Dirar bin Sard Abu Naeem narrated to me, Mutamir bin Sulayman narrated to us," with his chain, and its wording is that the Messenger of Allah ﷺ measured a hand-span for Fatimah from her hem and said, "This is the trailing hem of a woman's garment." Dirar bin Sard Abu Naeem the flour-grinder is daif, and Daraqutni and others declared him daif, while in al-Taqrib it says, "Truthful, but has confused matters." Their mutual corroboration indicates that neither of them erred in this, though some scholars spoke harshly about Dirar bin Sard, to the point that if he had transmitted it alone, he would be counted among the weak narrators.Similar in meaning is what was also related from Umm Salama, that the Prophet ﷺ measured a hand-span for Fatimah from her waist-wrap. This was reported by Tirmidhi (1732) and Ahmad (26554), both from the hadith of Affan, who said, "Hammad bin Salama narrated to us, who said, Ali bin Zayd narrated to us, from Umm Hasan, that Umm Salama narrated to them," and she related the hadith. Tirmidhi said, "Some of them related it from Hammad bin Salama, from Ali bin Zayd, from Hasan, from his mother, from Umm Salama." Ali bin Zayd bin Jadan is daif, and Hasan here is Imam Basri, who was a mudallis.Similar in meaning is also what was related from Ibn Umar, who said, "The Messenger of Allah ﷺ permitted the Mothers of the Believers a hand-span for the trailing hem, then they asked him for more, so he added another hand-span for them. They would then send to us, and we would measure a forearm-length for them." This was reported by Abu Dawud (4119), Ibn Majah (2581), and Ahmad (4683), all from the hadith of Sufyan Thawri, who said, "Zayd Ammi narrated to me, from Abu Siddiq, from Ibn Umar," and he related it. Zayd Ammi is Zayd bin Hawari, Abu Hawari of Basra, who is daif by the agreement of the scholars, although Daraqutni held a favorable opinion of him. Abu Siddiq is Bakr bin Amr, though it is also said he is Ibn Qays al-Naji, with a nun and a jim, a man of Basra among the narrators relied upon by the compilers of the six major collections.Similar in meaning is also what was related from Abu Hurairah, that the Prophet ﷺ commanded Fatimah or Umm Salama to let the hem trail a forearm-length. This was reported by Ibn Majah (3582) and Ahmad (7573), both from the hadith of Hammad bin Salama, from Abu Muhazzim, from Abu Hurairah, and he related it. Abu Muhazzim, with a doubled za, of the Tamim tribe and of Basra, whose name was Yazid, though it is also said to be Abdul-Rahman bin Sufyan, is daif by the agreement of the scholars, and Nasai said, "His hadith is to be abandoned."It was also reported by Ahmad (24469) and Ibn Majah (3583) through another route from Abu Muhazzim, from Abu Hurairah, from Ayesha, that the Messenger of Allah ﷺ, regarding the trailing hems of women's garments, said, "A hand-span." She said, "I said, then their calves would show." He said, "Then a forearm-length."The legal understanding of the hadith is that the scholars agreed on the permissibility of women trailing their garments, but they disliked exceeding two hand-spans or a forearm-length, since doing so involves wasting money, encourages rivalry and boasting among women, and resembles the foreign disbelieving women who let their garments trail five forearm-lengths or more, with other women carrying the train behind them.