Al-Baqarah 2:54

<h2>The Children of Israel kill each other in Repentance</h2><p>This was the repentance required from the Children of Israel for worshipping the calf. Commenting on Allah's statement; </p><div class="arabic uthmani">وَإِذْ قَالَ مُوسَى لِقَوْمِهِ يَـقَوْمِ إِنَّكُمْ ظَلَمْتُمْ أَنفُسَكُمْ بِاتِّخَاذِكُمُ الْعِجْلَ</div><p>(And (remember) when Musa said to his people: "O my people! Verily, you have wronged yourselves by worshipping the calf...), Al-Hasan Al-Basri said, "When their hearts thought of worshipping the calf, </p><div class="arabic uthmani">وَلَمَّا سُقِطَ فَى أَيْدِيهِمْ وَرَأَوْاْ أَنَّهُمْ قَدْ ضَلُّواْ قَالُواْ لَئِن لَّمْ يَرْحَمْنَا رَبُّنَا وَيَغْفِرْ لَنَا</div><p>(And when they regretted and saw that they had gone astray, they (repented and) said: "If our Lord does not have mercy upon us and forgive us") (7:149). This is when Musa said to them, </p><div class="arabic uthmani">يَـقَوْمِ إِنَّكُمْ ظَلَمْتُمْ أَنفُسَكُمْ بِاتِّخَاذِكُمُ الْعِجْلَ</div><p>(O my people! Verily, you have wronged yourselves by worshipping the calf...)." Abu `Al-`Aliyah, Sa`id bin Jubayr and Ar-Rabi` bin Anas commented on, </p><div class="arabic uthmani">فَتُوبُواْ إِلَى بَارِئِكُمْ</div><p>(So turn in repentance to your Bari') that it means, "To your Creator." Allah's statement, </p><div class="arabic uthmani">إِلَى بَارِئِكُمْ</div><p>(to your Bari' (Creator)) alerts the Children of Israel to the enormity of their error and means, "Repent to He Who created you after you associated others with Him …

And when Moses said unto his people: O my people! Ye have wronged yourselves by your choosing of the calf (for worship) so turn in penitence to your Creator, and kill (the guilty) yourselves. That will be best for you with your Creator and He will relent toward you. Lo! He is the Relenting, the Merciful.

And remember Moses said to his people: "O my people! Ye have indeed wronged yourselves by your worship of the calf: So turn (in repentance) to your Maker, and slay yourselves (the wrong-doers); that will be better for you in the sight of your Maker." Then He turned towards you (in forgiveness): For He is Oft-Returning, Most Merciful.

And (remember) when Musa (Moses) said to his people: "O my people! Verily, you have wronged yourselves by worshipping the calf. So turn in repentance to your Creator and kill yourselves (the innocent kill the wrongdoers among you), that will be better for you with your Lord." Then He accepted your repentance. Truly, He is the One Who accepts repentance, the Most Merciful.

And recall that Moses said to his people, “O my people, you have done wrong to yourselves by worshiping the calf. So repent to your Maker, and kill your egos. That would be better for you with your Maker.” So He turned to you in repentance. He is the Accepter of Repentance, the Merciful.