Narrated Abu Hurairah: A man was killed in the lifetime of the Prophet صلی اللہ علیہ وسلم . The matter was brought to the Prophet صلی اللہ علیہ وسلم . He entrusted him to the legal guardian of the slain. The slayer said: Messenger of Allah, I swear by Allah, I did not intend to kill him. The Messenger of Allah صلی اللہ علیہ وسلم said to the legal guardian: Now if he is true and you kill him, you will enter Hell-fire. So he let him go. His hands were tied with a strap. He came out pulling his strap. Hence he was called Dhu an-Nis'ah (possessor of strap).

Narrated Wail ibn Hujr: I was with the Prophet صلی اللہ علیہ وسلم when a man who was a murderer and had a strap round his neck was brought to him. He then called the legal guardian of the victim and asked him: Do you forgive him? He said: No. He asked: Will you accept the blood-money? He said: No. He asked: Will you kill him? He said: Yes. He said: Take him. When he turned his back, he said: Do you forgive him? He said: No. He said: Will you accept the blood-money? He said: No. He said: Will you kill him? He said: Yes. He said: Take him. After repeating all this a fourth time, he said: If you forgive him, he will bear the burden of his own sin and the sin of the victim. He then forgave him. He (the narrator) said: I saw him pulling the strap.