Makhul and Ata' (may Allah have mercy on them) said: We found the people holding the position that in the time of the Messenger of Allah (peace and blessings be upon him) the diyah for killing was 100 camels; then Sayyiduna Umar (may Allah be pleased with him) fixed this diyah at 1000 dinars or 12000 (twelve thousand) dirhams. If this diyah falls upon a Bedouin, then 100 camels are due from him; he is not obliged to pay gold or silver.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16165