Tafsir of Yusuf 12:97

Now, when the truth of the matter became clear, the brothers of Yusuf asked for the forgiveness of their father in a spiritually endearing style by saying: قَالُوا يَا أَبَانَا اسْتَغْفِرْ‌ لَنَا ذُنُوبَنَا إِنَّا كُنَّا خَاطِئِينَ : 'Our father, pray to Allah to forgive us our sins. Surely, we have been wrong - 97.' Thus, it is obvious that a person who prays to Allah Ta` ala for the forgiveness of their sins would do that himself too.