Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: In the time of the Messenger of Allah, a man was killed, and the Prophet (peace and blessings be upon him) fixed his diyah at 12000, and this is (what is referred to in) the saying of Allah Almighty: "And they resented nothing" [Surah al-Tawbah: 74] (to the end of) the verse.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16177