Khalid bin 'Abdullah al-Tahan خالد بن عبد الله بن عبد الرحمن الطحان · The Book of ad-Dahaya (Sacrifices)

'Abdullah told him that the Messenger of Allah used to offer the sacrifice at the prayer place.

"I heard the Messenger of Allah say" - and he gestured with his fingers, but his fingers were shorter than the fingers of the Messenger of Allah - he said "It is not permissible to offer as a sacrifice an animal that clearly has one bad eye, a lame animal that is obviously lame, as sick animal that is obviously sick, or an animals that is so emaciated that it is as if there is no marrow in its bones."

"The Messenger of Allah forbade sacrificing an animals with its ears slit form the front, and animals with its ears slit form the back, and animal with its ears slit lengthwise, an animals with a round hole in tits ear, or an animals with its nose cut off"

" The Messenger of Allah commanded us to examine the eyes and ears (of animals for sacrifice)."

"When distributing the spoils of war, the Messenger of Allah used to make ten sheep equivalent to one camel." Shu'bah said: "I know most if it from what I heard form Sa'eed bin Masruq, and Sufyan narrated it to me." (Sahih )

he caught two rabbits and he could not find a knife with which to slaughter then, so he slaughtered them with Marwah. Then he came to the Prophet and said: "O Mesenger of Allah! I caught two rabbits but I could not find a knife with which to slaughter them, so I slaughtered them with Marwah;l can I eat them?" He said: "Eat (them)."

"There are two things that I memorized from the Messenger of Allah, who said: 'Allah has decreed proficiency in all things, so when you kill, kill well, and when you slaughter, slaughter well. Let one of you sharpen his blade and spare suffering to the animal he slaughters.'" (Sahih)

" The Messenger of Allah said: 'I used to forbid you from doing three things: to visit graves, but now visit three, for you may benefit from that. And I used to forbid you (from eating) the meat of sacrificial animals after three days but now eat it, and keep whatever you want. A and I forbade you to drink form (certain kinds of) vessels, but now drink form whatever kind of vessel you want but do not drink any…

"The Messenger of Allah said: An animal that has been taken as a target is not lawful."