مَنْ تَوَضَّأَ ثُمَّ أَتَى الْجُمُعَةَ فَاسْتَمَعَ وَأَنْصَتَ غُفِرَ لَهُ مَا بَيْنَهُ وَبَيْنَ الْجُمُعَةِ وَزِيَادَةُ ثَلَاثَةِ أَيَّامٍ
Transliteration
Man tawadda'a thumma atal-jumu'ata fastama'a wa ansata ghufira lahu ma baynahu wa baynal-jumu'ati wa ziyadatu thalathati ayyam
English meaning
Whoever performs wudu well, comes to Jumu'ah, listens, and remains silent will have his sins from one Friday to the next forgiven plus three more days.
When is it recited?
Remembered when attending Jumu'ah.
Source
Muslim, Jumu'ah 27