Jabir · The Book of Sacrifices

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).

Allah's Messenger (ﷺ) 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 (ﷺ) had-already offered sacrifice. Thereupon Allah's Apostle (ﷺ) 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 (ﷺ) had sacrificed (his animal)

Eat, make a provision, and keep it.

We did not eat the flesh of our sacrificial animals beyond three days in Mina. Then Allah's Messenger (ﷺ) permitted us saying: Eat and make it a provision (for journey). I asked 'Ata' whether Jabir had also said: Till we came to Medina. He said: Yes.

We did not eat the flesh of sacrificed animals beyond three (days), but then Allah's Messenger (ﷺ) commanded us to make it a provision for journey and cat it (beyond three days).

We made provision (out of the flesh of sacrificed animals for our journey) to Medina during the lifetime of Allah's Messenger (ﷺ).