1 verse has
“undankbaren”
in Edition A. S. F. Bubenheim and N. Elyas / Al-Hajj (The Pilgrimage)
22:38Gewiß, Allah verteidigt diejenigen, die glauben. Gewiß, Allah liebt keinen undankbaren Verräter.
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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