Du'a asking for forgiveness and mercy

رَبِّ اغْفِرْ لِي وَارْحَمْنِي وَتُبْ عَلَيَّ

Rabbighfir li warhamni wa tub 'alayya

My Lord, forgive me, have mercy upon me, and accept my repentance.

Adapted from Sunan Abī Dāwūd 1516, which reads "Rabbi-ghfir lī wa tub ʿalayya, innaka anta at-Tawwābu ar-Raḥīm", with "warḥamnī" added.