The word(s) "let" appears 241 time(s) in 215 verse(s) in Quran in Mohsin Khan translation.

(151) So let not their speech, then, grieve you (O Muhammad صلى الله عليه وسلم). Verily, We know what they conceal and what they reveal.

(152) For the like of this let the workers work.

(153) Sad. [These letters (Sad, etc.) are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings]. By the Qur'an full of reminding (explanations and honour for the one who believes in it).

(154) Or is it that the dominion of the heavens and the earth and all that is between them is theirs? If so, let them ascend up with means (to the heavens)!

(155) This is so! Then let them taste it - a boiling fluid and dirty wound discharges.

(156) Ha-Mim. [These letters are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings].

(157) None disputes in the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) of Allah but those who disbelieve. So let not their ability of going about here and there through the land (for their purposes) deceive you [O Muhammad صلى الله عليه وسلم, for their ultimate end will be the Fire of Hell]!

(158) Then, when he brought them the Truth from Us, they said: "Kill the sons of those who believe with him and let their women live"; but the plots of disbelievers are nothing but in vain!

(159) Fir'aun (Pharaoh) said: "Leave me to kill Musa (Moses), and let him call his Lord (to stop me from killing him)! I fear that he may change your religion, or that he may cause mischief to appear in the land!"

(160) Ha-Mim. [These letters are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings].