Sahih al-Bukhari 2901
Sahih al-Bukhari · Book 56: Fighting for the Cause of Allah (Jihaad) · To play with spears and other similar arms
Narrated Abu Huraira:
حَدَّثَنَا إِبْرَاهِيمُ بْنُ مُوسَى ، أَخْبَرَنَا هِشَامٌ ، عَنْ مَعْمَرٍ ، عَنِ الزُّهْرِيِّ ، عَنِ ابْنِ الْمُسَيَّبِ ، عَنْ أَبِي هُرَيْرَةَ ـ رضى الله عنه ـ قَالَ بَيْنَا الْحَبَشَةُ يَلْعَبُونَ عِنْدَ النَّبِيِّ صلى الله عليه وسلم بِحِرَابِهِمْ دَخَلَ عُمَرُ، فَأَهْوَى إِلَى الْحَصَى فَحَصَبَهُمْ بِهَا. فَقَالَ " دَعْهُمْ يَا عُمَرُ " . وَزَادَ عَلِيٌّ حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَخْبَرَنَا مَعْمَرٌ فِي الْمَسْجِدِ.
While some Ethiopians were playing in the presence of the Prophet, `Umar came in, picked up a stone and hit them with it. On that the Prophet (ﷺ) said, "O `Umar! Allow them (to play)." Ma`mar (the subnarrator) added that they were playing in the Mosque.