Amr ibn Shu’ayb (RA) reported from his father on the authority of his grandfather that the Prophet (SAW) said, “If anyone slays a Believer wilfully then he should be handed over to the heirs of the slain. If they wish, they may kill him or if they wish, take bloodmoney from him. Bloodmoney is thirty she-camels in their fourth year, thirty she-camels in their fifth year and forty pregnant camels and that which the heirs have decided. This (diyat) is severe for the aaqilah.
[Abu Dawud 4506. Ibn e Majah 2626, Ahmed 6729]