1 verse has
“voluntárias”
in Edition Samir El-Hayek / Al-Israa (The Night Journey)
17:79E pratica, durante a noite, orações voluntárias; talvez assim teu Senhor te conceda uma posição louvável.
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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