حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ هِشَامِ بْنِ عُرْوَةَ، عَنْ أَبِيهِ، أَنَّهُ كَانَ يَقُولُ لَيْسَ عَلَى الْعَاقِلَةِ عَقْلٌ فِي قَتْلِ الْعَمْدِ إِنَّمَا عَلَيْهِمْ عَقْلُ قَتْلِ الْخَطَإِ ‏.‏

Yahya related to me from Malik from Hisham ibn Urwa that hisfather said, "The tribe is not obliged to pay blood-money forintentional murder. They pay blood-money for accidental killing." Translation Not Available

Book reference: Muwatta Imam Malik Book 43 Hadith 1584
Web reference: Muwatta Imam Malik Book 43 Hadith 8