Mishkat al-Masabih 5 Funerals كتاب الجنائز 197

وَعَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَيْسَ مِنَّا مَنْ ضَرَبَ الْخُدُودَ وَشَقَّ الْجُيُوبَ وَدَعَا بِدَعْوَى الْجَاهِلِيَّةِ»

‘Abdallah b. Mas’ud reported God’s messenger as saying, “He who beats the cheeks, tears the front of the garments, and cries out as people did in pre-Islamic times, does not belong to us.” (Bukhari and Muslim.)