Al-A'raf · 7:149

149. When they regretted their actions and did not know how to make-up for their wrongdoing, realising that they had gone astray from the straight path by worshipping the calf besides to Allah, they said: 'If our Lord does not have mercy on us, by enabling us to do as He instructed, and if He does not forgive us for having worshipped the calf, then we would certainly be among the losers in the life of this world and in the Afterlife.'