Hadith.2489 - Imam (as) said:
"Regarding sheep: when they come forward, they bring blessings, and when they go away, they still bring blessings.
Regarding cattle: when they come forward, they bring blessings, and when they go away, they take blessings with them.
Regarding camels: when they come forward, they take blessings away, and when they go away, they take even more blessings away."