It is narrated from Sayyiduna Abu Qatadah (may Allah be pleased with him) that the Prophet Muhammad (peace and blessings be upon him) said: "Whoever sends an animal for sacrifice as a voluntary act and that animal perishes, then that person should not eat anything from it, because if he eats anything from it, he will be obliged to provide a replacement. He should slaughter that animal, dip its shoe in its blood, and then mark its side. However, if it was an obligatory sacrifice, then if he wishes, he may eat from it."