What is meant by udhiyah (sacrifice)? Is it obligatory or Sunnah?
1. Udhiyah means an animal of the an’aam class (i.e., camel, cow, sheep or goat) that is slaughtered during the days of ‘Eid al-Adha.
2. Udhiyah is one of the rituals of Islam prescribed in the Book of Allah and the Sunnah of His Messenger (peace and blessings of Allah be upon him), and according to the consensus of the Muslims. Please see the detailed answer for more about the rulings on udhiyah.
https://islamqa.info/en/36432
