Nasai

(1) The sacrificial animals that are taken to the Haram should be adorned with a collar. If they are camels, they should also be marked (ish‘ar), and they should be driven forward. The riding animals should follow behind. In this, there is respect for the sacrificial animals and an expression of the symbols (sha‘a’ir) of Allah. Moreover, the animals will proceed according to their own will; they will not have to be chased from behind.

(2) The meaning of the chapter could also be: “Taking the sacrificial animal along with oneself.” In that case, the purpose of the chapter would be that taking the sacrificial animal with oneself is superior to purchasing it after arriving there, because in this there is greater hardship and a greater expression of the symbols of Allah. This is the Sunnah of the Messenger (sallallahu alayhi wa sallam), but since it was apparent to you that many of the Companions (radi Allahu anhum) could not bear such hardship and expenses. And Allah knows best.

1:
With Ibn Majah, "Abdur Rahman bin Dawud" has corroborated "Zaid bin Hubab," and furthermore, with him, there is also a supporting narration (shahid) for this from Ibn Abbas radi Allahu anha.

This pertains to the Farewell Pilgrimage (Hajjat al-Wada‘). The Prophet sallallahu alayhi wa sallam sacrificed one hundred camels. Out of these, sixty-three (63) he slaughtered with his own blessed hand, and the remaining thirty-seven (37) were slaughtered by Ali radi Allahu anhu as his deputy.

Benefit:
From this hadith, it is established that there is no fixed limit to the number of sacrificial animals; as much as Allah grants ability, that many animals can be slaughtered. Every person should slaughter his own animal himself, but appointing a deputy for slaughtering the animal is also permissible. And it is Sunnah to eat something from each of the animals that are sacrificed.

In the present era, the pilgrims are not given the meat of the sacrifice; rather, money is taken from them, and no one knows about these sacrifices—what kind of animal was mine, etc. Pilgrims even have to buy meat from the market on the day of Eid al-Adha. This situation is questionable and requires reflection and consideration. May Allah accept the noble services of the Kingdom of Saudi Arabia in His court, Ameen. Indeed, they have truly fulfilled the right of being the Custodians of the Two Holy Sanctuaries. So may Allah reward them with the best of rewards.