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.