Riyad as-Salihin 1658
Ibn Mas'ud (May Allah be pleased with him) said:
The Messenger of Allah (ﷺ) said, "He who (on befalling a calamity) slaps his cheeks, tears his clothes and follows the ways and traditions of the Days of Ignorance is none of us." [Al-Bukhari and Muslim] .
وعن ابن مسعود رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم  ‏:‏‏
"‏ليس منا من ضرب الخدود، وشق الجيوب، ودعا بدعوى الجاهليه‏"‏ ‏(‏‏(‏متفق عليه‏)‏‏)‏‏.‏