Sayyiduna Adi bin Hatim (may Allah be pleased with him) asked the Messenger of Allah (peace and blessings be upon him) about game killed by the broad side of a spear (mi'rad). He (peace and blessings be upon him) said: "When you mention the name of Allah and strike the game with the spear and it makes its blood flow, then eat, even if it kills it; but if it strikes with its broad side and kills it, then do not eat."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18948