1 verse has
“regretful”
in Edition Clear Qur'an by Talal Itani / Al-Hujuraat (The Inner Apartments)
49:6O you who believe! If a troublemaker brings you any news, investigate, lest you harm people out of ignorance, and you become regretful for what you have done.
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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