1 verse has
“ممنون”
in Edition Simple Clean / Al-Inshiqaaq (The Splitting Open)
25:84إلا الذين آمنوا وعملوا الصالحات لهم أجر غير ممنون
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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