مَنْ صَامَ رَمَضَانَ إِيمَانًا وَاحْتِسَابًا، غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ، وَمَنْ قَامَ رَمَضَانَ إِيمَانًا وَاحْتِسَابًا، غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ، وَمَنْ قَامَ لَيْلَةَ الْقَدْرِ إِيمَانًا وَاحْتِسَابًا، غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِهِ
Translation: Whoever fasts Ramadan with faith and seeking reward is promised forgiveness of past sins; the same promise is given for standing in prayer during Ramadan and on the Night of Decree, with faith and seeking reward.
Source: البخاري ومسلم
Three acts of worship share a common condition: صَامَ رَمَضَانَ (“fasted Ramadan”), قَامَ رَمَضَانَ (“stood in prayer during Ramadan”), and قَامَ لَيْلَةَ الْقَدْرِ (“stood in worship on the Night of Decree”).
The repeated phrase إِيمَانًا وَاحْتِسَابًا connects worship to belief, sincerity, and expectation of reward from Allah. غُفِرَ لَهُ is passive in form: “he was forgiven.”