Messenger of ALLAH (ﷺ) Said:
A human does no action from on the day of Nahr more beloved to ALLAH then spilling blood.
On the Day of judgement, it will appear with its horns, and hair, and hooves, and
indeed the blood will be accepted by ALLAH from where it is received before it even falls upon earth,
so let your heart delight in it.
Reference: Jami'at-Tirmidhi 1493
in-book reference: book 19, Hadith 1