Volume 8, Book 78, Number 666:
Narrated Jundub:
I witnessed the Prophet offering the ‘Id prayer (and after finishing it) he delivered a sermon and
said, “Whoever has slaughtered his sacrifice (before the prayer) should make up for it (i.e. slaughter
another animal) and whoever has not slaughtered his sacrifice yet, should slaughter it by mentioning
Allah’s Name over it.”