1 verse has
“sincero”
in Edition Julio Cortes / An-Nisaa (The Women)
4:146salvo si se arrepienten, se enmiendan, se aferran a Alá y rinden a Alá un culto sincero. Éstos estarán en companía de los creyentes y Alá dará a los creyentes una magnífica recompensa.
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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