It wasnarrated that Abu Hurairah said:
The Messenger of Allah (ﷺ)said:"Whoever smoothes the pebbles, then he has engaged in Laghw."* (JA)
English reference (JA): Vol. 1, Book 5, Hadith 1025 (JA)
Arabic reference (JA): Book 5, Hadith 1078 (JA)