Dua for forgiveness and mercy

We all need it from time to time:

وَقُل رَّبِّ اغْفِرْ وَارْحَمْ وَأَنتَ خَيْرُ الرَّاحِمِينَ

rabbighfir warham wa-anta khayru arrahimeen

My Lord (rabb), forgive (igfir) and (wa) have mercy (arham), and (wa) You are (anta) the best (khayru) of the merciful (arrahimeen).

Surah Al-Mu’minūn, ayat 118Note: the ayat contains a command at the begining: Wa Qul (And Say).