Abu Dawud said: The correct name is Sawwad b. Dawud al-Muzani al-Sairafi (and not Dawud b. Sawwad as mentioned in the chain). The narrator waki' misunderstood it.
In-book : Book 34, Hadith 95
English translation : Book 33, Hadith 4102
34. Clothing (Kitab Al-Libas)
باب فِي قَوْلِهِ عَزَّ وَجَلَّ { وَقُلْ لِلْمُؤْمِنَاتِ يَغْضُضْنَ مِنْ أَبْصَارِهِنَّ }