[qs:108:2]

Zayd lbn Arqam (RA) relates that the Companions (ra) asked, "O Rasulullah! (Saw) What is Qurbani?" He replied, "It is the sunnah of your father lbraheem (as)." They asked again, "What benefit do we get from it?" He answered, "A reward for every hair (of the sacrificed animal)." "And (what reward is there for animals with) wool, 0 Rasoolullah (Saw)?" they asked. "A reward", he said, "for every fibre of the wool.", (Ibne Majah)