2 verses have
“certes”
in Edition Muhammad Hamidullah / Ash-Shu'araa (The Poets)
26:97«Par Allah! Nous étions certes dans un égarement évident,
26:185Ils dirent: «Tu es certes du nombre des ensorcelés;
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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