Musannaf Ibn Abi Shaybah 34363 — Reports on al-Hasan and al-Husayn

Ibn Abi Nu'm (may Allah have mercy on him) said: I was sitting with Sayyiduna Ibn Umar (may Allah be pleased with them both) when a man came and asked about the blood of a mosquito. Sayyiduna Ibn Umar (may Allah be pleased with them both) said to him: "Where are you from?" He said: "I am from the people of Iraq." At this Sayyiduna Ibn Umar (may Allah be pleased with them both) said: "Oh! People, look at this man! He is asking me about the blood of a mosquito, when these people killed the son of the Messenger of Allah (peace and blessings be upon him)! And I heard the Messenger of Allah (peace and blessings be upon him) say: 'Those two are my fragrant flowers of this world.'"