Hisnul Muslim 96

Remembrance In the morning and evening

أَسْتَغْفِرُ اللَّهَ وَأَتُوبُ إِلَيْهِ

'Astaghfirullaaha wa 'atoobu 'ilayhi.

I seek the forgiveness of Allah and repent to Him. (100 times during the day.)