Sahih Muslim | Book 22 | Chapter 2

Narrated by Jabir
Jabir reported Allah's Messenger (may peace be upon him) as saying: Sacrifice only a grown-up animal, unless it is difficult for you, in which case sacrifice a ram (of even less than a year, but more than six months' age).

Narrated by Jabir b. 'Abdullah
Jabir b. 'Abdullah reported: Allah's Messenger (may peace be upon him) led us in the 'Id prayer in Medina on the Day of Sacrifice. Some persons slaughtered their animals ahead of him under the impression that Allah's Apostle (may peace be upon him) had-already offered sacrifice. Thereupon Allah's Apostle (may peace be upon him) said: Those who had slaughtered their animals ahead of him should slaughter the other ones in their stead. And they should not sacrifice the animal before Allah's Messenger (may peace be upon him) had sacrificed (his animal)

Narrated by Uqba b. 'Amir
Uqba b. 'Amir reported that Allah's Messenger (may peace be upon him) gave the gifts of goats to be distributed amongst his Companions. They sacrificed them, but a lamb of one year of age was left. (Someone) made a mention of that to the Messenger of Allah (may peace be upon him), whereupon he said: You sacrifice it.

Narrated by Amir al-Juhani
Amir al-Juhani reported: Allah's Messenger (may peace be upon him) distributed sacrificial animals (amongst us for sacrificing them on 'Id al-Adha). So we sacrificed them. There fell to my lot a lamb of less than one year I said: Allah's Messenger, there has fallen to my lot a lamb (Jadha'a), whereupon he said: Sacrifice that.

Narrated by
This hadith has been transmitted on the authority of 'Uqba b. 'Amir al-Juhan with a slight change of wording.