a fat calf
Genesis 18:7
And Abraham ran unto the herd, and fetcht a calf tender and good, and gave it unto a young man; and he hasted to dress it.
Genesis 18:8
And he took butter, and milk, and the calf which he had dressed, and set it before them; and he stood by them under the tree, and they did eat.
Luke 15:23
And bring hither the fatted calf, and kill it; and let us eat, and be merry: