Waail reported,

I witnessed the Messenger of Allah ﷺ when the killer was brought to him, being led by the victim's heir with a rope around him.The Messenger of Allah ﷺ asked the victim's heir, "Will you pardon him?"He said, "No."He asked, "Then will you accept the blood-money?"He said, "No."He asked, "Then will you kill him?"He said, "Yes."He said, "Take him away."When the man went off and turned away from him, he called him back and asked, "Will you pardon him?"He said, "No."He asked, "Then will you accept the blood-money?"He said, "No."He asked, "Then will you kill him?"He said, "Yes."He said, "Take him away."When the man went off and turned away from him, he called him back again and asked, "Will you pardon him?"He said, "No."He asked, "Then will you accept the blood-money?"He said, "No."He asked, "Then will you kill him?"He said, "Yes."He said, "Take him away."At that point the Messenger of Allah ﷺ said, "If you pardon him, he will bear his own sin and the sin of your companion."So he pardoned him and let him go, and I saw him dragging his rope behind him.

Nasai 5417

Sahih

أخبرنا محمد بن بشار قال حدثنا يحيى بن سعيد عن عوف قال حدثني حمزة أبو عمر العائذي قال حدثنا علقمة بن وائل

عن وائل قال

شهدت رسول الله ﷺ حين جاء بالقاتل يقوده ولي المقتول في نسعة فقال رسول الله ﷺ لولي المقتول أتعفو قال لا قال فتأخذ الدية قال لا قال فتقتله قال نعم قال اذهب به فلما ذهب فولى من عنده دعاه فقال أتعفو قال لا قال فتأخذ الدية قال لا قال فتقتله قال نعم قال اذهب به فلما ذهب فولى من عنده دعاه فقال أتعفو قال لا قال فتأخذ الدية قال لا قال فتقتله قال نعم قال اذهب به فقال رسول الله ﷺ عند ذلك أما إنك إن عفوت عنه يبوء بإثمه وإثم صاحبك فعفا عنه وتركه فأنا رأيته يجر نسعته

النسائي 5417صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Etiquette of judges
Chapter
Gesturing by the judge to the adversary to pardon
Numbering
Darussalam 5417
Nasai 5417