The word(s) "تستغفر" appears in 3 verse(s) in Quran.

(1) اسْتَغْفِرْ لَهُمْ أَوْ لَا تَسْتَغْفِرْ لَهُمْ إِن تَسْتَغْفِرْ لَهُمْ سَبْعِينَ مَرَّةً فَلَن يَغْفِرَ اللَّهُ لَهُمْ ۚ ذَ‌ٰلِكَ بِأَنَّهُمْ كَفَرُوا بِاللَّهِ وَرَسُولِهِ ۗ وَاللَّهُ لَا يَهْدِي الْقَوْمَ الْفَاسِقِينَ

(سورة التوبة, At-Tawba, Chapter #9, Verse #80)
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(2) قَالَ يَا قَوْمِ لِمَ تَسْتَعْجِلُونَ بِالسَّيِّئَةِ قَبْلَ الْحَسَنَةِ ۖ لَوْلَا تَسْتَغْفِرُونَ اللَّهَ لَعَلَّكُمْ تُرْحَمُونَ

(سورة النمل, An-Naml, Chapter #27, Verse #46)
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(3) سَوَاءٌ عَلَيْهِمْ أَسْتَغْفَرْتَ لَهُمْ أَمْ لَمْ تَسْتَغْفِرْ لَهُمْ لَن يَغْفِرَ اللَّهُ لَهُمْ ۚ إِنَّ اللَّهَ لَا يَهْدِي الْقَوْمَ الْفَاسِقِينَ

(سورة المنافقون, Al-Munaafiqoon, Chapter #63, Verse #6)
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