Sahih al-Bukhari 3753
Sahih al-Bukhari · Book 62: Companions of the Prophet · The merits of Al-Hasan and Al-Husain رضي الله عنهما
Narrated Ibn Abi Nu'm:
حَدَّثَنِي مُحَمَّدُ بْنُ بَشَّارٍ ، حَدَّثَنَا غُنْدَرٌ ، حَدَّثَنَا شُعْبَةُ ، عَنْ مُحَمَّدِ بْنِ أَبِي يَعْقُوبَ ، سَمِعْتُ ابْنَ أَبِي نُعْمٍ ، سَمِعْتُ عَبْدَ اللَّهِ بْنَ عُمَرَ ، وَسَأَلَهُ، عَنِ الْمُحْرِمِ،، قَالَ شُعْبَةُ أَحْسِبُهُ يَقْتُلُ الذُّبَابَ فَقَالَ أَهْلُ الْعِرَاقِ يَسْأَلُونَ عَنِ الذُّبَابِ وَقَدْ قَتَلُوا ابْنَ ابْنَةِ رَسُولِ اللَّهِ صلى الله عليه وسلم، وَقَالَ النَّبِيُّ صلى الله عليه وسلم " هُمَا رَيْحَانَتَاىَ مِنَ الدُّنْيَا " .
`Abdullah bin `Umar was asked about a muhrim (a person in the state of pilgrimage). Shu'bah (a subnarrator) said "I think killing flies." I heard him saying (in reply). "The people of Iraq are asking about flies while they themselves murdered the son of the daughter of Allah's Messenger (ﷺ). The Prophet (ﷺ) said, 'They (i.e. Hasan and Husain) are my two sweet basils in this world.' "