Expiation of his sin

عَفَا ٱللَّهُ عَنكَ لِمَ أَذِنتَ لَهُمْ حَتَّىٰ يَتَبَيَّنَ لَكَ ٱلَّذِينَ صَدَقُوا۟ وَتَعْلَمَ ٱلْكَٰذِبِينَ

Allah give thee grace! why didst thou grant them until those who told the truth were seen by thee in a clear light, and thou hadst proved the liars?

لِّيَغْفِرَ لَكَ ٱللَّهُ مَا تَقَدَّمَ مِن ذَنۢبِكَ وَمَا تَأَخَّرَ وَيُتِمَّ نِعْمَتَهُۥ عَلَيْكَ وَيَهْدِيَكَ صِرَٰطًۭا مُّسْتَقِيمًۭا

That Allah may forgive thee thy faults of the past and those to follow; fulfil His favour to thee; and guide thee on the Straight Way;

وَوَضَعْنَا عَنكَ وِزْرَكَ

And removed from thee thy burden

ٱلَّذِىٓ أَنقَضَ ظَهْرَكَ

The which did gall thy back?-