It is narrated from Abu Salamah (may Allah be pleased with him), he says: I asked Aisha (may Allah be pleased with her), "What was the dowry of the Prophet ﷺ (that he gave to his wives)?" She replied: "The dowry of the Prophet ﷺ for his wives was twelve uqiyah and one nash." Then she said: "Do you know how much a nash is?" I said: "No," so she said: "Half an uqiyah."
Hadith Referenceمسند الإمام الشافعي / كتاب النكاح / 1113
Hadith Takhrijاخرجه مسلم ، النکاح باب الصداق وجواز كونه تعلیم قرآن و خاتم حديد... الخ (1426)۔