The sacrificial animal (hady)

Imam Abu Ya'la (may Allah have mercy on him) related through Suwayd bin Sa'id, Ali bin Mushir, Isma'il and al-Hasan that it is narrated from Sayyiduna Anas (may Allah be pleased with him) that he said: A man came to the Messenger of Allah (peace and blessings be upon him) driving his sacrificial camel while he himself was barefoot, so he (peace and blessings be upon him) said: "Ride it!" So the man rode it.
I (Ibn Hajar) say: This hadith is also in the Sahih, through Sayyiduna Anas (may Allah be pleased with him) himself, but the words "barefoot" are not mentioned there.

Imam Abu Dawud (may Allah have mercy on him) relates that it is narrated from Sayyiduna Ali or Sayyiduna Hudhayfah (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) made the Muslims partners in their sacrificial animals (hady) and said: "One cow suffices on behalf of seven people."

It is narrated from Humayd bin Abd al-Rahman that the Messenger of Allah (peace and blessings be upon him) used to send sacrificial animals (hady) (towards the Haram), and he (peace and blessings be upon him) would instruct the person with whom he sent the animals: "If any of them becomes exhausted (and close to perishing), slaughter it, then dye its sandal (which has been hung on its neck as a mark) in its blood and mark one side of its neck with it (so that it is known to be a sacrificial animal), and let the travellers who come after you eat it; but do not eat anything of it yourself, nor should any companion of your caravan eat anything of it."
Imam Muhammad bin Sirin (may Allah have mercy on him) also used to act according to this prophetic instruction regarding sacrificial animals.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both), concerning a man who himself stays (at home) and sends a sacrificial animal (hady) (towards the Haram), that he said: "He should fix a day (for the sacrifice), and when that day comes, he should refrain from all the things that a person in ihram avoids."
This narration is sahih (authentic) as mawquf (stopping at the Companion).

It is narrated from Abd al-Rahman bin Sabit (may Allah have mercy on him): "The Messenger of Allah (peace and blessings be upon him) and his Companions (may Allah be pleased with them) used to slaughter (nahr) the sacrificial camels in such a state that their left foreleg was tied and they were standing on their remaining legs."

It is narrated from Sayyiduna Abu Qatadah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said concerning voluntary sacrificial camels: "If it begins to perish (through injury) before it enters the bounds of the Haram, slaughter it, then dip your hand in its blood and mark its side, and do not eat anything of it yourself, for if you eat anything of it, you will be liable to pay compensation for it."

It is narrated from Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that a man said: "O Messenger of Allah, the sacrifice of a camel was obligatory upon me, and now the sacrificial camels have already been slaughtered (that is, none is available to me), so what do you instruct in this regard?" The Messenger of Allah (peace and blessings be upon him) said: "Slaughter seven goats in its (the camel's) place."

It is narrated from Sayyiduna Ali bin Abi Talib (may Allah be pleased with him): "On the blessed occasion of his Hajj, the Prophet (peace and blessings be upon him) drove one hundred camels with him as an offering (for sacrifice)."