Conditions of Tawbah

The summarized answer for the question is that it is upon the one who repents to combine all the aforementioned conditions: That he regrets the past, he has a firm resolve not to go back (to that sin), and he increases in righteous actions. Part of this is that he increases in performing voluntary acts from the same type of the obligatory acts of worship that he neglected whether it is fasting, Ṣalāh, or other than that, Clear?