Muwatta Imam Malik Book of Blood-Money, Hadith 7
Yahya related to me from Malik from Yahya ibn Said that Said ibn al-Musayyab used to say,' 'When a tooth is struck and becomes black, there is complete blood- money for it. If it falls out after it becomes black, there is also the complete blood-money for it."
وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ زَيْدِ بْنِ أَسْلَمَ، عَنْ مُسْلِمِ بْنِ جُنْدُبٍ، عَنْ أَسْلَمَ، مَوْلَى عُمَرَ بْنِ الْخَطَّابِ أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَضَى فِي الضِّرْسِ بِجَمَلٍ وَفِي التَّرْقُوَةِ بِجَمَلٍ وَفِي الضِّلَعِ بِجَمَلٍ .