Qatada قتادة · The Chapters on Blood Money

“Whoever helps to kill a believer, even with half a world, he will meet Allah (SWT) with (the words) written between his eyes, 'He has no hope of the mercy of Allah (SWT).”

“Whoever kills deliberately, he will be handed over to the heirs of the victim. If they want, they may kill him, or if they want, they may accept the blood money, which is thirty Hiqqah, thirty Jadha'ah and forty Khalifah. This is the blood money for deliberate slaying. Whatever is settled by reconciliation belongs to them, and that is a binding covenant.”