Matthew Poole and continuators on Acts 7:41

41 And they made a calf in those days, and offered sacrifice unto the idol, and rejoyced in the works of their own hands.

In imitation of the Egyptians, who worshipped their God Apis in that, or the like form of an Ox.

The Calf which they had made, which they could not be so sottish as to terminate their worship in, knowing that they themselves had made it, and it had not made them; yet they are for this charged to have committed Idolatry, 1 Cor. 10.6, 7.

Which joy they express by feasting, singing, and dancing, Exod. 32.7.

So, this Idol and Idols, generally are called, Psal. 115.4. and 135.15. which is enough to speak their emptiness and vanity; vain man can make but vain Gods.