Genesis 18:7

And Abraham ran unto the herd
While Sarah and her maids were kneading the dough and making the cakes: and fetched a calf tender and good;
a fine fat calf, which was reckoned very delicious food, and much in use with the ancients ^F17 and generally made a part in any grand entertainment, and was accounted fit for a king, see ( 1 Samuel 28:24 1 Samuel 28:25 ) ( Luke 15:23 ) : and gave [it] unto a young man:
one of his servants, to kill and dress as soon as possible; Jarchi says this was Ishmael, whom he trained up to such service: and he hasted to dress it;
the young man made all the haste he could to get it ready, according to the orders of Abraham.