It wasnarrated from Sa'eed bin Jubair that a relative of 'AbdullahbinMughaffal threw some small pebbles. He told him not to do that andsaid:
"The Prophet (ﷺ) forbade throwing small pebbles and said:'They do not kill any game nor hurt the enemy, but they can break atooth or put out an eye.'" He did it again, and he ('Abdullah)said:"I tell you that the Prophet (ﷺ) forbade that and then yougo and doit again? I will never speak to you again." (PT)
English reference (PT): Vol. 4, Book 28, Hadith 3226 (PT)
Arabic reference (PT): Book 28, Hadith 3348 (PT)