For coming back after a long time away. A repentance prayer, or a prayer of repentance, can start with one honest sentence.
He arose, and came to his father. But while he was still far off, his father saw him, and was moved with compassion, and ran, and fell on his neck, and kissed him. Luke 15:20
Father, I’ve been gone a long time. I stopped talking to You, and I did things my way. I’m not going to pretend it was fine. I’m sorry. I don’t have a speech ready, only this: I want to come home. Thank You that You run toward people like me. Take me back. In Jesus’ name, amen.