وَحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ سَعِيدَ بْنَ الْمُسَيَّبِ، وَسُلَيْمَانَ بْنَ يَسَارٍ، كَانَا يَقُولاَنِ فِي مُوضِحَةِ الْعَبْدِ نِصْفُ عُشْرِ ثَمَنِهِ ‏.‏

Yahya related to me from Malik that he had heard that Said ibnal-Musayyab and Sulayman ibn Yasar said, "The head wound of the slavein which the bone is bared is a twentieth of his price." Translation Not Available

Book reference: Muwatta Imam Malik Book 43 Hadith 1580
Web reference: Muwatta Imam Malik Book 43 Hadith 8