Imam al-Zuhri (may Allah have mercy on him) and Ibn Abi Rabah (may Allah have mercy on him) say that Sayyiduna Umar (may Allah be pleased with him) fixed the blood money at 1000 dinars or 12000 dirhams.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16185