2 verses have
marratan
in Edition English Transliteration / At-Tawba (The Repentance)

9:80istaghfir lahum aw laa tastaghfir lahum in tastaghfir lahum sab'eena marratan falany yaghfiral laahu lahum; zaalika bi annahum kafaroo billaahi wa Rasoolih; wallaahu laa yahdil qawmal faasiqeen

9:126Awalaa yarawna annahum yuftanoona fee kulli 'aamim marratan aw marrataini summa laa yatooboona wa laa hum yazzakkkaroon