(An-Naml) 27 : 11
إِلَّا مَنْ ظَلَمَ ثُمَّ بَدَّلَ حُسْنًا بَعْدَ سُوءٍ فَإِنِّي غَفُورٌ رَحِيمٌ
Except for the one who wronged himself, then substitutes good after evil; then indeed I am Forgiving and Merciful.
Since Moses has accidentally killed a man he was feared by seeing his staff turning into a moving snake even in Lord’s presence. See explanation 4: 99-100; 25: 68-70 and 26: 20-22.