(Joseph’s brothers) said, “O our father... Ask for us forgiveness of our sins... Indeed, we were mistaken.”
Sayyed Abbas Sadr-Ameli
They said: 'O' our father! Ask forgiveness of our sins for us, verily we were guilty'.
Al-muntakhab fi tafsir al-Qur'an al-Karim
There said the ten –guilty- sons to their father: "O father, invoke Allah's forgiveness on our behalf for what We committed of sinful deeds; we were indeed wrongful of actions."