Ubayy bin Kaab reported,

On the day of Uhud, sixty-four men of the Ansar were killed, along with six of the Muhajirun, among them Hamza, and the enemy mutilated their dead. So the companions of the Messenger of Allah ﷺ said, "If we ever have a day like this against the polytheists, we will go beyond what they did to us."Then, on the day of the conquest of Makkah, a man whose identity was not known called out, "After today there is no more Quraysh!"So the crier of the Messenger of Allah ﷺ announced, "Safety is granted to black and white alike, except for so-and-so and so-and-so," naming certain individuals.Then Allah revealed, "And if you retaliate, retaliate only to the extent that you were harmed. But if you are patient, that is certainly better for those who are patient" [Nahl 16:126].So the Messenger of Allah ﷺ said, "We will be patient and will not retaliate."

عن أبي بن كعب قال

لما كان يوم أحد قتل من الأنصار أربعة وستون رجلا، ومن المهاجرين ستة وفيهم حمزة، ومثلوا بقتلاهم، فقال أصحاب رسول الله ﷺ: لئن كان لنا يوم مثل هذا من المشركين لنربين عليهم، فلما كان يوم الفتح قال رجل لا يعرف: لا قريش بعد اليوم، فنادى منادي رسول الله ﷺ: أمن الأسود والأبيض إلا فلانا وفلانا. ناسا سماهم، فأنزل الله عز وجل: {وإن عاقبتم فعاقبوا بمثل ما عوقبتم به ولئن صبرتم لهو خير للصبرين} [النحل: ١٢٦] فقال رسول الله ﷺ: نصبر ولا نعاقب.