Hadith.3524 - It is narrated by Abu Al-Bakhtari from Imam Jafar ibn Muhammad Al-Sadiq (as) from his father, Imam Muhammad ibn Ali Al-Baqir (as), that Imam Ali ibn Abi Talib (as) said
"It is not permissible in emancipation (freeing a slave) for the blind, the one-eyed, or the crippled. However, it is permissible for the one with a paralyzed hand or the lame."