حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ يَحْيَى بْنِ سَعِيدٍ، عَنْ سَعِيدِ بْنِ الْمُسَيَّبِ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَضَى فِي الْمَرْأَةِ إِذَا تَزَوَّجَهَا الرَّجُلُ أَنَّهُ إِذَا أُرْخِيَتِ السُّتُورُ فَقَدْ وَجَبَ الصَّدَاقُ ‏.‏

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. Translation Not Available

Book Ref: Muwatta Imam Malik Book 28 Hadith 1105
Web Ref:  Muwatta Imam Malik Book 28 Hadith 12