Quran 20:90

(20:90) When Aaron addressed the believers in Moses’ absence, he told them:

20:90 Part: “O my people, this is a test for you. Your only Lord is the Most Gracious, so follow me, and obey my commands.”

20:83 "Why did you rush away from your people, O Moses?"20:84 He said, "They are close behind me. I have rushed to You my Lord, that You may be pleased."20:85 He said, "We have put your people to the test after you left, but the Samarian misled them."20:86 Moses returned to his people, angry and disappointed, saying, "O my people, did your Lord not promise you a good promise? Could you not wait? Did you want to incur wrath from your Lord? Is this why you broke your agreement with me?"20:87 They said, "We did not…

Note that the people of Moses made an agreement with him to worship the Most Gracious in his absence, but they still broke their agreement (20:87) when he was away. Moses’s brother Aaron could not control them and was afraid that he might be blamed for dividing the Children of Israel and disobeying the orders of Moses. Thus, the people who followed the Samarian were duped by the devil. Also note that in this group of people, none of them proved to be a believer, as they violated the command of messenger Moses and…