أَسْتَغْفِرُ اللّٰهَ وَأَتُوْبُ إِلَيْهِ.
Transliteration
Astaghfiru-l-llāha wa atūbu ilayh.
Translation
I seek Allah’s forgiveness and turn to Him in repentance.
Source: Burdah (raḍiy Allāhu ʿanhu) narrated that we (the companions) were seated when the Messenger of Allah ﷺ came. He said: “No morning has passed by except that I have sought Allah’s forgiveness in it a 100 times.” (Ṭabarānī: al-Muʿjam al-Awsaṭ 3879)