'Bull calves' in the Bible

And he appointed his own priests for the high places and for the goat idols and for the bull calves that he had made.

So now you yourselves are considering [that you are] strong before the kingdom of Yahweh [which is] in the hand the sons of David, since you yourselves are a great multitude and you have bull calves of gold that Jeroboam has made for idols.