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

(51) The likeness of those who take (false deities as) Auliya' (protectors, helpers) other than Allah is the likeness of a spider who builds (for itself) a house; but verily, the frailest (weakest) of houses is the spider's house - if they but knew.

(52) In the nearest land (Syria, Iraq, Jordan, and Palestine), and they, after their defeat, will be victorious.

(53) He has created the heavens without any pillars that you see, and has set on the earth firm mountains lest it should shake with you. And He has scattered therein moving (living) creatures of all kinds. And We send down water (rain) from the sky, and We cause (plants) of every goodly kind to grow therein.

(54) O wives of the Prophet! You are not like any other women. If you keep your duty (to Allah), then be not soft in speech, lest he in whose heart is a disease (of hypocrisy, or evil desire for adultery) should be moved with desire, but speak in an honourable manner.

(55) Verily! Allah grasps the heavens and the earth lest they should move away from their places, and if they were to move away from their places, there is not one that could grasp them after Him. Truly, He is Ever Most Forbearing, Oft-Forgiving.

(56) Then We destroyed the rest (the town of Sodom at the place of the Dead Sea now in Palestine).

(57) lest a person should say: "Alas, my grief that I was undutiful to Allah (i.e. I have not done what Allah has ordered me to do), and I was indeed among those who mocked [at the truth! i.e. La ilaha illallah (none has the right to be worshipped but Allah), the Qur'an, and Muhammad صلى الله عليه وسلم and at the faithful believers]

(58) Or (lest) he should say: "If only Allah had guided me, I should indeed have been among the Muttaqun (the pious - See V.2:2)."

(59) Or (lest) he should say when he sees the torment: "If only I had another chance (to return to the world), then I should indeed be among the Muhsinun (good-doers - See V.2:112)."

(60) And you have not been hiding yourselves (in the world), lest your ears, and your eyes, and your skins should testify against you; but you thought that Allah knew not much of what you were doing.