Yahya related to me from Malik from Yahya ibn Said from Said ibnal-Musayyab that 'Umar ibn al-Khattab decided about the woman who wasmarried by a man and the marriage had been consummated, that thebride-price was obligatory. (IT)
USC-MSA web (English) reference: Book 28, Hadith 12 (IT)
Arabic reference (IT): Book 28, Hadith 1105 (IT)