"When Allah granted His Messenger (ﷺ) victory over Makkah, he stood (to deliver an address) among the people. He thanked and praised Allah, then he said: 'And from whomever (one of his relatives) was killed, then he has two options to choose from: Either to pardon or that he be killed.'"
Jami` at-Tirmidhi Book 16, Hadith 21