the sun at the time of breaking the fast, and similar matters; in such cases, the report of a single person is accepted. But if he is not trustworthy and says, “By Allah, it is one year and one month old”—meaning a goat—mentioning the month to give an impression of precision and make his claim more believable, then he is not to be believed, especially if there is an indication of his lying, such as the animal’s small size.
If the person himself can determine its age by examining its teeth or the like, that is sufficient.
The third condition is that it be free of defects that prevent it from being valid, the details of which will follow.
The fourth condition is that it be slaughtered at the prescribed time, the details of which will follow.
Thus, there are four conditions for the udhiyah (Eid sacrifice). As for the hady (sacrificial offering), no specific time is stipulated for it, except in the case of one who brings a sacrificial offering during Hajj: he may not slaughter it before the Day of Sacrifice. As for one who brings a sacrificial offering during Umrah, he slaughters it upon his arrival.
His statement, “One sheep suffices for one person,” means that a person offers a sheep as a sacrifice for himself; and, in terms of reward, it also suffices for him and the members of his household. This is because the Messenger of Allah ﷺ “would sacrifice a single sheep for himself and his household” (1), while he had nine wives.