2 verses have
“يومئذ”
in Edition Simple Clean / Az-Zalzala (The Earthquake)
4:99يومئذ تحدث أخبارها
6:99يومئذ يصدر الناس أشتاتا ليروا أعمالهم
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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