2 verses have
“رَبُّنَا”
in Edition Uthmani / Saba (Sheba)
19:34فَقَالُوا۟ رَبَّنَا بَٰعِدْ بَيْنَ أَسْفَارِنَا وَظَلَمُوٓا۟ أَنفُسَهُمْ فَجَعَلْنَٰهُمْ أَحَادِيثَ وَمَزَّقْنَٰهُمْ كُلَّ مُمَزَّقٍ ۚ إِنَّ فِى ذَٰلِكَ لَءَايَٰتٍۢ لِّكُلِّ صَبَّارٍۢ شَكُورٍۢ
26:34قُلْ يَجْمَعُ بَيْنَنَا رَبُّنَا ثُمَّ يَفْتَحُ بَيْنَنَا بِٱلْحَقِّ وَهُوَ ٱلْفَتَّاحُ ٱلْعَلِيمُ
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Those who spend their wealth by night and day, privately and publicly, will receive their reward from their Lord. They have nothing to fear, nor shall they grieve.
The Holy Quran · Al-Baqara (The Cow) · 2:274