2 verses have
“الصادقين”
in Edition Simple Clean / Al-A'raaf (The Heights)
70:7قالوا أجئتنا لنعبد الله وحده ونذر ما كان يعبد آباؤنا ۖ فأتنا بما تعدنا إن كنت من الصادقين
106:7قال إن كنت جئت بآية فأت بها إن كنت من الصادقين
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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