From him عليه السلام, from his forefathers عليه السلام, peace be upon them: Imam al-Sadiq عليه السلام said: “The Prophet صلى الله عليه وعلى آله وسلم, saw a man flicking a pebble in the mosque. Prophet صلى الله عليه وعلى آله وسلم said: “It continues to be cursed until it lands.” He صلى الله عليه وعلى آله وسلم said: “Flicking pebbles in gatherings is from the manners of people of Lut.” Then Prophet صلى الله عليه وعلى آله وسلم, peace be upon him, recited: “And you commit in your gatherings what is detestable” (Surah Al Ankabut 29:29), And Prophet صلى الله عليه وعلى آله وسلم said: “That is the flicking of pebbles.”