Mishkat al-Masabih #1392

‘A’isha reported God’s Messenger as saying, "On the day of sacrifice no one does a deed more pleasing to God than the shedding of blood. The sacrifice will come on the day of resurrection with its horns, its hairs and its hoofs, and the blood finds acceptance with God before it falls on the ground, so be glad about it.” Tirmidhi and Ibn Majah transmitted it.