Taha 20:90 ولقد قال لهم هارون من قبل يا قوم انما فتنتم به وان ربكم الرحمان فاتبعوني واطيعوا امري ٩٠

Harun prohibits them from worship of Calf and the Persistence of the Children of Israel in doing so

Allah, the Exalted, informs of Harun's attempt to prohibit them from worshipping the calf and his telling them that this was only a test for them. He told them that their Lord was the Most Beneficent,