The Prophet ﷺ forbade the throwing of stones (with the thumb and the index or middle finger), and said "It neither hunts a game nor kills (or hurts) an enemy, but it gouges out an eye or breaks a tooth."  

نَهَى النَّبِيُّ ﷺ عَنِ الْخَذْفِ وَقَالَ إِنَّهُ لاَ يَقْتُلُ الصَّيْدَ وَلاَ يَنْكَأُ الْعَدُوَّ وَإِنَّهُ يَفْقَأُ الْعَيْنَ وَيَكْسِرُ السِّنَّ  

The Messenger of Allah ﷺ prohibited throwing pebbles (in sport) saying : game is not caught by such means. Neither is an enemy injured, but it may sometimes put out an eye or break a tooth.  

نَهَى رَسُولُ اللَّهِ ﷺ عَنِ الْخَذْفِ قَالَ إِنَّهُ لاَ يَصِيدُ صَيْدًا وَلاَ يَنْكَأُ عَدُوًّا وَإِنَّمَا يَفْقَأُ الْعَيْنَ وَيَكْسِرُ السِّنَّ  

“The Prophet ﷺ forbade throwing small pebbles and said: ‘They do not kill any game nor hurt the enemy, but they can break a tooth or put out an eye.’” He did it again, and he (‘Abdullah) said: “I tell you that the Prophet ﷺ forbade that and then you go and do it again? I will never speak to you again.”  

وَقَالَ إِنَّ النَّبِيَّ ﷺ نَهَى عَنِ الْخَذْفِ وَقَالَ إِنَّهَا لاَ تَصِيدُ صَيْدًا وَلاَ تَنْكَأُ عَدُوًّا وَلَكِنَّهَا تَكْسِرُ السِّنَّ وَتَفْقَأُ الْعَيْنَ قَالَ فَعَادَ فَقَالَ أُحَدِّثُكَ أَنَّ النَّبِيَّ ﷺ نَهَى عَنْهُ ثُمَّ عُدْتَ لاَ أُكَلِّمُكَ أَبَدًا  

“The Prophet ﷺ forbade throwing small pebbles and said: ‘They do not kill any game or hurt the enemy, but they can break a tooth or put out an eye.’”  

نَهَى النَّبِيُّ ﷺ عَنِ الْخَذْفِ وَقَالَ إِنَّهَا لاَ تَقْتُلُ الصَّيْدَ وَلاَ تَنْكِي الْعَدُوَّ وَلَكِنَّهَا تَفْقَأُ الْعَيْنَ وَتَكْسِرُ السِّنَّ