4-136 Muhammad ibn al-Hassan ibn Ahmad ibn al-Walid - may God be pleased with him - narrated that Muhammad ibn al-Hassan al-Saffar quoted Al-Abbas ibn Ma’ruf, on the authority of Al-Hassan ibn Mahboob, on the authority of Ali ibn Re’ab, on the authority of Abi Hamzih that Ali ibn al-Hussein as-Sajjad (MGB) said,

“Animals can recognize four things: their Lord - the Blessed the Sublime; death; male and female; and pastures.”