2 verses have
“cui”
in Edition Hamza Roberto Piccardo / Adh-Dhaariyat (The Winnowing Winds)
51:13Il Giorno in cui saranno messi alla prova del Fuoco
51:60Guai a coloro che non credono, per via del Giorno di cui sono stati minacciati.
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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