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wa-lammā suqiṭa fī ʾaydīhim wa-raʾaw ʾannahum qad ḍallū qālū la-ʾin lam yarḥamnā rabbunā wa-yaghfir lanā la-nakūnanna mina l-khāsirīna
But when they became remorseful and realised they had gone astray, they said, ‘Should our Lord have no mercy on us, and forgive us, we will be surely among the losers.’
— Ali Quli Qarai
Surah al-‘Araf – Verse 149
149. “And when they smote their hands and saw that they had gone astray, they said: ‘Should our Lord have not mercy on us and forgive us (not), we shall certainly be of the losers’,”
When Moses (as) came back from the mountain, the Children of Israel realized that they had made mistake and were of the losers. The verse says:
Some of the commentators believe that Sāmeri, with the information he had, had set some special pipes in the breast of a golden calf through which some pressed air could pass out and a sound, similar to the sound of a cow, was heard from the mouth of that calf.