Abdullah bin Umar reported,

The Messenger of Allah ﷺ shaved his head, and a group of his companions also shaved their heads, while others shortened their hair. The Messenger of Allah ﷺ said, "May Allah have mercy on those who shaved their heads," once or twice, then he added, "and those who shortened their hair."

Ahmad 6005

Sahih

حدثنا هاشم حدثنا ليث حدثنا نافع

عن عبد الله بن عمر أنه قال

حلق رسول الله ﷺ وحلق طائفة من أصحابه وقصر بعضهم فقال رسول الله ﷺ رحم الله المحلقين مرة أو مرتين ثم قال والمقصرين

أحمد 6005صحيح
Contents
Reference
Commentary
Ayat
Collection
Musnad Ahmad
Book
Abdullah bin Umar
Numbering
Darussalam 6005
Ahmad 6005