Musnad Ahmad 658:158

Yazid narrated to us, Dawud and Ibn Abi Adi informed us, from Dawud—the meaning—from Amir, from Al-Bara’ ibn Azib, that the Prophet (peace be upon him) said—Ibn Abi Adi said: The Messenger of Allah (peace be upon him) delivered a sermon to us and said: "Let no one slaughter before we pray." My maternal uncle stood up to him and said: "O Messenger of Allah, this is a day of meat, there is much of it in it"—Ibn Abi Adi said: "It is disliked"—"and I have slaughtered my sacrifice before so that my family and neighbors may eat, and I have a young she-goat (anaq) that is better than a meat-goat, so shall I slaughter it?" He said: "Yes, but it shall not suffice as a sacrifice for anyone after you, and it is the better of your two sacrifices."