مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1858
Musnad of 'Abdullah bin al-'Abbas bin 'Abdul-Muttalib from the Prophet
It was narrated from Ibn "Abbas that the Messenger of Allah (ﷺ) said: "O Allah, forgive those who shaved their heads." A man said: And those who cut their hair? He said: “O Allah, forgive those who shaved their heads." The man said: And those who cut their hair? And on the third or fourth time he said: "and those who cut their hair.”
Musnad Ahmad 1859Sahih because of corroborating evidence; this is a Da'if isn