Yahya bin Abi Kathir يحيى بن أبي كثير الطائي · The Chapters on Blood Money

the Prophet (ﷺ) set the blood money at twelve thousand (Dirham). He said: “This is what Allah says: 'And they could not find any cause to do so except that Allah and his Messenger (ﷺ) had enriched them of His bounty.'” He said: “By their taking the blood money.”