Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrated to Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that a group of people in ihram passed by him at al-Rabadhah and asked him for a fatwa about game meat that some people not in ihram had found: may they eat it? He gave them a fatwa that they may eat it. He said: Then I came to Sayyiduna Umar (may Allah be pleased with him) and asked him about it. He said: What fatwa did you give them? He said: I gave them a fatwa that they may eat it. Sayyiduna Umar (may Allah be pleased with him) said: Had you given them any other fatwa, I would have punished you painfully.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9914