(45) بَابُ الْوَلَدُ مَبْخَلَةٌ مَجْبَنَةٌ
Ibn Abi Nu'm said, "I was with Ibn 'Umar when a man asked him about theblood 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 gnatswhen they murdered the grandson of the Prophet, may Allah bless him and granthim peace! I heard the Prophet, may Allah bless him and grant him peace,say, 'They are my sweet basil in this world.'"
Reference: Al-Adab Al-Mufrad 85
In-book reference: Book 5, Hadith 2
English translation: Book 5, Hadith 85