Riyad as-Salihin 36
'Abdullah bin Mas'ud (May Allah be pleased with him) reported:
I can still recall as if I am seeing the Messenger of Allah (ﷺ) resembling one of the Prophets whose people scourged him and shed his blood, while he wiped blood from his face, he said: "O Allah! Forgive my people, because they certainly do not know". [Al-Bukhari and Muslim] .
وعن أبي عبد الرحمن عبد الله بن مسعود رضي الله عنه قال‏:‏ كأني انظر إلى رسول الله صلى الله عليه وسلم يحكي نبياً من الأنبياء، صلوات الله وسلامه عليهم، ضربه قومه فأدموه وهو يمسح الدم عن وجهه، يقول ‏:‏ ‏
"‏اللهم اغفر لقومى فإنهم لا يعلمون‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏ ‏.‏