Narrated Al-Bara’ b. ‘Azib said that when God's Messenger was asked what should be avoided in sacrificial animals he pointed with his hand* and said, "Four types:
a lame animal which obviously limps, a one-eyed animal which has obviously lost the sight of one eye, a sick animal which is obviously sick, and a lean animal which has no marrow.”
*i.e. his fingers.
Malik, Ahmad, Tirmidhi, Abu Dawud, Nasa’i, Ibn Majah and Darimi transmitted it.
'Ali said, “God’s Messenger enjoined us to pay great attention to the eye and the ear, and not sacrifice an animal with a slit which leaves something hanging at the front or back of the ear, or with a lengthwise slit or a perforation in the ear."
Tirmidhi, Abu Dawud, Nasa’i, Darimi and Ibn Majah transmitted it, but Ibn Majah's words ended with "and the ear.”