The word(s) "lest" appears 66 time(s) in 65 verse(s) in Quran in Mohsin Khan translation.

(41) And We have placed on the earth firm mountains, lest it should shake with them, and We placed therein broad highways for them to pass through, that they may be guided.

(42) "And I seek refuge with You, My Lord! lest they should come near me."

(43) Is there a disease in their hearts? Or do they doubt or fear lest Allah and His Messenger (صلى الله عليه وسلم) should wrong them in judgement. Nay, it is they themselves who are the Zalimun (polytheists, hypocrites and wrong-doers).

(44) Make not the calling of the Messenger (Muhammad صلى الله عليه وسلم) among you as your calling one of another. Allah knows those of you who slip away under shelter (of some excuse without taking the permission to leave, from the Messenger (صلى الله عليه وسلم). And let those who oppose the Messenger's (Muhammad صلى الله عليه وسلم) commandment (i.e. his Sunnah - legal ways, orders, acts of worship, statements) (among the sects) beware, lest some Fitnah (disbelief, trials, afflictions, earthquakes, killing, overpowered by a tyrant) should befall them or a painful torment be inflicted on them.

(45) "And touch her not with harm, lest the torment of a Great Day should seize you."

(46) The people of Lut (Lot) (-who dwelt in the town of Sodom in Palestine) belied the Messengers.

(47) So invoke not with Allah another ilah (god) lest you should be among those who receive punishment.

(48) Till, when they came to the valley of the ants, one of the ants said: "O ants! Enter your dwellings, lest Sulaiman (Solomon) and his hosts should crush you, while they perceive not."

(49) And when Our Messengers came to Ibrahim (Abraham) with the glad tidings they said: "Verily, we are going to destroy the people of this [Lut (Lot's)] town (i.e. the town of Sodom in Palestine); truly, its people have been Zalimun [wrong-doers, polytheists disobedient to Allah, and who belied their Messenger Lut (Lot)]."

(50) And indeed We have left thereof an evident Ayah (a lesson and a warning and a sign - the place where the Dead Sea is now in Palestine) for a folk who understand.