Maliks Muwatta Book 20, Hadith Number 82.

Yahya related to me from Malik, from Ibn Shihab, that Salim ibn Abdullah heard Abu Hurayra relating to Abdullah ibn Umar how a group of three people in ihram had passed him at ar-Rabadha and had asked him for a fatwa about eating game which people who were not in ihram were eating, and he told them that they could eat it. He said, “Then I went to Umar ibn al-Khattab in Madina and asked him about it, and he said, ‘What did you say to them?’ and I said, ‘I told them that they could eat it.’ Umar said, ‘If you had told them anything else I would have done you an injury.'”