1 verse has
“Vertragstreue”
in Edition A. S. F. Bubenheim and N. Elyas / Al-A'raaf (The Heights)
7:102Und Wir fanden bei den meisten von ihnen keine Vertragstreue, sondern Wir fanden (, daß) die meisten von ihnen fürwahr Frevler (waren).
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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