Volume 7, Book 67, Number 408:
Narrated Jundub bin Sufyan Al-Bajali:
Once during the lifetime of Allah’s Apostle we offered some animals as sacrifices. Some people
slaughtered their sacrifices before the (Id) prayer, so when the Prophet finished his prayer, he saw
that they had slaughtered their sacrifices before the prayer. He said, “Whoever has slaughtered (his
sacrifice) before the prayer, should slaughter (another sacrifice) in lieu of it; and whoever has not yet
slaughtered it till we have prayed; should slaughter (it) by mentioning Allah’s Name.”