حَدَّثَنَا مُحَمَّدُ بْنُ مِهْرَانَ الرَّازِيُّ، حَدَّثَنَا سُفْيَانُ بْنُ عُيَيْنَةَ، عَنْ عَمْرٍو، عَنْ سَعِيدِ بْنِ جُبَيْرٍ، قَالَ قَالَ ابْنُ عَبَّاسٍ حَدَّثَنِي أُبَىُّ بْنُ كَعْبٍ، عَنْ رَسُولِ اللَّهِ صلى الله عليه وسلم قَالَ أَبْصَرَ الْخَضِرُ غُلاَمًا يَلْعَبُ مَعَ الصِّبْيَانِ فَتَنَاوَلَ رَأْسَهُ فَقَلَعَهُ فَقَالَ مُوسَى { أَقَتَلْتَ نَفْسًا زَكِيَّةً } " . الآيَةَ ."
Ibn "Abbas said :
Ubayy b. Ka'b told me that the Messenger of Allah (ﷺ) said : Al-khidr saw a youth playing with boys. He took him by his head and uprooted it. Moses then said : Hast you slain an innocent person who had slain none.
Reference: Sunan Abi Dawud 4707
In-book : Book 42, Hadith 112
English translation : Book 41, Hadith 4690