The Animals in the Stable

The ox and the ass have been universally adopted in depictions of the Nativity and always appear in crèches. Their origin is not to be found in the Gospels, however, but in the prophecies of Isaiah:
"The ox knoweth his owner,
and the ass his master's crib:
but Israël doth not know
my people doth not consider"
Isaiah( 1: 3)