It is narrated from Sayyiduna Ibn Amr, may Allah be pleased with him, that the Noble Prophet, peace and blessings be upon him, said: "Whoever kills even a sparrow unjustly, Allah Almighty will question him about it on the Day of Resurrection." Someone asked, "O Messenger of Allah! What is its right?" He said: "He should slaughter it, not seize it by the neck and break it."