1 verse has
“Undankbaren”
in Edition A. S. F. Bubenheim and N. Elyas / Saba (Sheba)
34:17Das vergalten Wir ihnen, daß sie undankbar waren. Vergelten Wir denn sonst jemand anderem als dem Undankbaren?
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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