Acts 7:41

And they made. calf in those days, and brought. sacrifice unto the idol, and rejoiced in the works of their hands.

Points to Note:

'The greater flagrance of this sin appears from the fact that it was committed immediately after those splendid manifestations of God's presence with Moses which the people had witnessed in Egypt, at the Red Sea, in the march to Mount Sinai...They rejected Moses after he had accomplished the main part of their deliverance.' (McGarvey p. 126)

For details on this section of history see Exodus chapter 32.

Notice how people will worship something in life. If. person doesn't worship and serve God, then they are bound to worship and serve something inferior to themselves (Romans 1:23).

Also note that if we are not content to abide by God's religious forms or pattern, then we will fall into the trap of human tradition. They made. golden calf, probably because they had been accustomed to seeing the Egyptians worship in this manner. Notice how they adopted the religious forms of their former persecutors!