1 verse has
“firmes”
in Edition Julio Cortes / Ar-Ra'd (The Thunder)
13:3Él es quien ha extendido la tierra y puesto en ella montañas firmes, ríos y una pareja en cada fruto. Cubre el día con la noche. Ciertamente, hay en ello signos para gente que reflexiona.
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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