Ibn Abi Nu'm said, "I was with Ibn 'Umar when a man asked him about the blood of gnats. He asked, 'Where are you from?' 'From the people of Iraq,' he replied. He said, 'Look at this man! He asks about the blood of gnats when they murdered the grandson of the Prophet, may Allah bless him and grant him peace! I heard the Prophet ﷺ say, 'They are my sweet basil in this world.'"

كُنْتُ شَاهِدًا ابْنَ عُمَرَ إِذْ سَأَلَهُ رَجُلٌ عَنْ دَمِ الْبَعُوضَةِ؟ فَقَالَ مِمَّنْ أَنْتَ؟ فَقَالَ مِنْ أَهْلِ الْعِرَاقِ فَقَالَ انْظُرُوا إِلَى هَذَا يَسْأَلُنِي عَنْ دَمِ الْبَعُوضَةِ وَقَدْ قَتَلُوا ابْنَ النَّبِيِّ ﷺ سَمِعْتُ النَّبِيَّ ﷺ يَقُولُ هُمَا رَيْحَانَيَّ مِنَ الدُّنْيَا

I was present when a man asked Ibn ʿUmar about the blood of mosquitoes. Ibn ʿUmar said, "From where are you?" The man replied. "From Iraq." Ibn ʿUmar said, "Look at that! he is asking me about the blood of Mosquitoes while they (the Iraqis ) have killed the (grand) son of the Prophet. I have heard the Prophet ﷺ saying, "They (Hasan and Husain) are my two sweet-smelling flowers in this world."

كُنْتُ شَاهِدًا لاِبْنِ عُمَرَ وَسَأَلَهُ رَجُلٌ عَنْ دَمِ الْبَعُوضِ فَقَالَ مِمَّنْ أَنْتَ فَقَالَ مِنْ أَهْلِ الْعِرَاقِ قَالَ انْظُرُوا إِلَى هَذَا يَسْأَلُنِي عَنْ دَمِ الْبَعُوضِ وَقَدْ قَتَلُوا ابْنَ النَّبِيِّ ﷺ وَسَمِعْتُ النَّبِيَّ ﷺ يَقُولُ هُمَا رَيْحَانَتَاىَ مِنَ الدُّنْيَا