Hazrat Ibn Abbas (may Allah be pleased with them both) was asked that if a person does not find a knife and slaughters with the edge of bamboo, what is the ruling on this? The Prophet (peace be upon him) said that if it cuts the veins like a knife and the person who is slaughtering has taken the name of Allah, then eat it; and if the veins are not cut and the animal dies, then do not eat it. I asked him about an animal slaughtered with a sharp stone in the case when a knife is not available, so he said that if it cuts the veins, then eat it; and if it cannot cut the veins and the animal dies, then do not eat it.