Setting
1- Whoever has a sacrificial animal for slaughtering, once the crescent of Dhu al-Hijjah is declared, he should not cut anything of his hair or his nails until he sacrifices
2- The Prophet (may Allah's peace and blessings be upon him) sacrificed two black and white horned rams.
3- The Messenger (may Allah's peace and blessings be upon him) prayed on the Day of An-Nahr, then delivered a sermon, then slaughtered (an animal) and said: Whoever slaughtered before praying should slaughter another animal instead, and whoever has not yet slaughtered should slaughter while mentioning Allah's name
4- Whoever can afford it but does not offer a sacrifice, let him not come near our prayer place
5- The Prophet (may Allah's peace and blessings be upon him) delivered a sermon after having offered the prayer on Eid al-Ad'ha. He said: Whoever prayed our prayer and slaughtered our sacrifice has properly observed the ritual. And whoever slaughtered (his sacrifice) before the (Eid) prayer has not observed the ritual