Allah Ta'ala, The Most Wise says:
"It is not their meat nor their blood that reaches Allâh, it is your piety that reaches Him. Indeed He has subjected them (animals) to you so that you may glorify Allah for guiding you, and give glad tidings to those who excel in good." (Quran-22:37)
The Noble Messenger of Allah(Peace be upon him) is reported to have said:
"For every hair that is on the sacrificial animal, one reward is recorded for the person making the Qurbâni."
"There is nothing dearer to Allâh during the days of Qurbâni than the sacrificing of animals. The sacrificed animal shall come on the Day of Qiyamah with its horns, hair and hooves (to be weighed in reward). The sacrifice is accepted by Allâh before the blood reaches the ground. Therefore sacrifice with an open and happy heart."
"Whoever has the capacity to sacrifice and does not do so, should not come to the place where the Eid prayer is offered." (Hadith-Ibn Majah).