طُوبَى لِمَنْ وَجَدَ فِي صَحِيفَتِهِ اسْتِغْفَارًا كَثِيرًا (Ibn Majah)
Translation: Blessed is the person who finds abundant seeking of forgiveness recorded in their book of deeds.
طُوبَى — blessedness or glad tidings; صَحِيفَتِهِ — his record; اسْتِغْفَارًا — asking forgiveness; كَثِيرًا — abundant.
Brief grammar: In لِمَنْ, the prefix لِـ means “for” and مَنْ means “the one who.” كَثِيرًا describes اسْتِغْفَارًا; both are accusative.
Istighfār is an acknowledgment of human shortcomings and a request for Allah's forgiveness. The narration praises keeping that request frequent.