Masruq narrates from Sayyiduna Abdullah (may Allah be pleased with him): "When you shoot game and it falls from a mountain and dies, do not eat it, for it may have died because of the fall; and if it falls into water and dies, do not eat it either, for it may have been killed by the water."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيد والذبائح / 18940