"He is not one of us he who slaps his cheeks, tears open his clothes, and wails in the manner of the days of ignorance." [Al-Bukhari]"

"عن عبد الله بن مسعود -رضي الله عنه- مرفوعًا: «ليس مِنَّا من ضرب الْخُدُودَ، وشَقَّ الْجُيُوبَ، ودعا بِدَعْوَى الجاهلية». [صحيح.] - [متفق عليه.]"