they were on a march, somr of them in Ihram and some not in Ihram. He said: "I saw an onager so I mounted my horse and picked up a spear. I asked them to help me but they refused to help me. I snatched a whip from one of them and chased the onager and caught it. They ate of it but they were scared. The prophet was asked about that and he said: 'Did you pint (at it) or help him?' They said, 'No.' He said: Then eat.'"
Sunan an-Nasa'i Book 24, Hadith 209