Surah Al-A'raf, Ayah 151

قَالَ بِئْسَمَا خَلَفْتُمُونِى مِن بَعْدِى

(He (Musa) said: "What an evil thing is that which you have done during my absence.") evil it is that which you committed after I departed and left you, by worshiping the calf,

أَعَجِلْتُمْ أَمْرَ رَبِّكُمْ

(Did you hasten in the matter of your Lord) Musa said, `You wanted me to rush back to you, even though being there this was Allah's decision' Allah said next,

وَأَلْقَى الأَلْوَاحَ وَأَخَذَ بِرَأْسِ أَخِيهِ يَجُرُّهُ إِلَيْهِ

(And he threw down the Tablets and seized his brother by his head and dragged him towards him.) This Ayah demonstrates the meaning of the Hadith,

Thereafter he turned to the Prophet Harun (علیہ السلام) and grasped the hair of his head. The Prophet Harun (علیہ السلام) then gave him the true account of the events and said that it was not his fault, for he stopped them from this wicked act but they did not listen to him. They were so obstinate about it that they were about to kill him. He said that he should not count him among the ignorant people and should not let his enemies laugh at him by treating him in that way. This made the Prophet Musa (علیہ السلام) cool down. At this occasion, he prayed to Allah, saying, رَ‌بِّ اغْفِرْ‌ لِي وَلِأَخِي وَأَدْخِلْنَا فِي رَ‌حْمَتِكَ ۖ وَأَنتَ أَرْ‌حَمُ الرَّ‌احِمِينَ "My Lord, forgive me and my brother, and admit us to Your mercy, and You are the most merciful of all those who show mercy." He asked forgiveness for his brother for any of his shortcoming with regard to his duties. He asked forgiveness for himself either for his putting away the tablets of the Torah in a hurry which the Holy Qur'an had described as having been 'dropped' to make a gesture of warning, or perhaps, for educating people that they should include themselves while asking forgiveness for others to preclude the sense of complacency on their part.

When Moses came down from the Mountain and saw the Israelites worshipping the golden calf, he held Aaron responsible for this, under the impression that he had neglected his duty as a reformer. Moses caught hold of him in anger but Aaron clarified his position and told him that he had done all he could to show them the right path. But they had not listened to him. So Moses checked himself, and started praying to God for Aaron. Many misunderstandings take place between believers, but after clarification they return to normalcy, just as if no misunderstanding had ever taken place.