2 verses have
“lest”
in Edition Clear Qur'an by Talal Itani / Al-Maaida (The Table)
5:21“O my people, enter the Holy Land which God has assigned for you, and do not turn back, lest you return as losers.”
5:49And judge between them according to what God revealed, and do not follow their desires. And beware of them, lest they lure you away from some of what God has revealed to you. But if they turn away, know that God intends to strike them with some of their sins. In fact, a great many people are corrupt.
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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