Eid al Ad'ha

" It is not their flesh, nor their blood, that reaches Allah; it is your righteousness {piety } that reaches Him….Their flesh will never reach Allah, nor yet their blood, but your devotion will reach Him" (Qur'an 22:37).
The main purpose of allowing Muslims to continue with animal sacrifices was to turn this tradition into an institution of charity. All the verses of the Qur'an which deal with the subject wind up with the proviso that the meat be fed to the poor, the needy, those who are too modest to beg as well as the mendicants.
Sacrifice is meant to be an act of worship and thanksgiving, it is meant to be an act of benevolence (Ihsan) to fulfill a social obligation. Any sacrifice that is allowed to go to waste is a sinful as well as a criminal violation.