The word(s) "lest" appears 64 time(s) in 64 verse(s) in Quran in Muhammad Pickthal translation.

(41) Moses said unto them: Woe unto you! Invent not a lie against Allah, lest He extirpate you by some punishment. He who lieth faileth miserably.

(42) (Saying): Eat of the good things wherewith We have provided you, and transgress not in respect thereof lest My wrath come upon you: and he on whom My wrath cometh, he is lost indeed.

(43) He said: O son of my mother! Clutch not my beard nor my head! I feared lest thou shouldst say: Thou hast caused division among the Children of Israel, and hast not waited for my word.

(44) And We have placed in the earth firm hills lest it quake with them, and We have placed therein ravines as roads that haply they may find their way.

(45) And I seek refuge in Thee, my Lord, lest they be present with me,

(46) Is there in their hearts a disease, or have they doubts, or fear they lest Allah and His messenger should wrong them in judgment? Nay, but such are evil-doers.

(47) Make not the calling of the messenger among you as your calling one of another. Allah knoweth those of you who steal away, hiding themselves. And let those who conspire to evade orders beware lest grief or painful punishment befall them.

(48) And touch her not with ill lest there come on you the retribution of an awful day.

(49) Therefor invoke not with Allah another god, lest thou be one of the doomed.

(50) Till, when they reached the Valley of the Ants, an ant exclaimed: O ants! Enter your dwellings lest Solomon and his armies crush you, unperceiving.