Al-Bara' b. 'Azib reported that his maternal'uncle Abu Burda b. Niyar sacrificed his animal earlier than the Prophet (ﷺ) had sacrificed. Thereupon he said

Apostle of Allah, it is the day of meat and it is not desirable (to have longing for it and not to make use of it immediately), so I hastened in offering my animal as a sacrifice, so that I might feed my family and neighbours and my kith and kin. Thereupon Allah's Messenger (ﷺ) said: Offer again your sacrifice. He said: Messenger of Allah , I have a small milch goat of less than one year, and that is better than two dry goats (from which only) meat (can be acquired). Thereupon he said: That is better than the two animals of sacrifice on your behalf, and the sacrifice of a goat, of less than six months shall not be accepted as a sacrifice on behalf of anyone after your (sacrifice).