Mishkat al-Masabih

Samura b. Jundub reported the Prophet (ﷺ) as saying, “Kill the old men who are polytheists, but spare their sharkh i.e., their children. Tirmidhi and Abu Dawud transmitted it.

وَعَن سَمُرَة بن جُنْدُبٍ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «اقْتُلُوا شُيُوخَ الْمُشْرِكِينَ وَاسْتَحْيُوا شَرْخَهُمْ» أَيْ صِبْيَانَهُمْ. رَوَاهُ التِّرْمِذِيّ وَأَبُو دَاوُد