Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) narrates from the Messenger of Allah (peace and blessings be upon him): "The killing of a believer is greater in the sight of Allah than the passing away of the world." (It is preserved as mawquf.)
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 15870