1 verse has
“masaainuhum”
in Edition English Transliteration / Al-Qasas (The Stories)
28:58Wa kam ahlaknaa min qaryatim batirat ma'eeshatahaa fatilka masaainuhum lam tuskam mim ba'dihim illaa qaleelaa; wa kunnaa Nahnul waariseen
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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