The word(s) "let" appears 168 time(s) in 139 verse(s) in Quran in Muhammad Habib Shakir translation.

(41) O you who believe! fight those of the unbelievers who are near to you and let them find in you hardness; and know that Allah is with those who guard (against evil).

(42) And let not their speech grieve you; surely might is wholly Allah's; He is the Hearing, the Knowing.

(43) And recite to them the story of Nuh when he said to his people: O my people! if my stay and my reminding (you) by the communications of Allah is hard on you-- yet on Allah do I rely-- then resolve upon your affair and (gather) your associates, then let not your affair remain dubious to you, then have it executed against me and give me no respite:

(44) They said: O Lut! we are the apostles of your Lord; they shall by no means reach you; so remove your followers in a part of the night-- and let none of you turn back-- except your wife, for surely whatsoever befalls them shall befall her; surely their appointed time is the morning; is not the morning nigh?

(45) And, O my people! let not opposition to me make you guilty so that there may befall you the like of what befell the people of Nuh, or the people of Hud, or the people of Salih, nor are the people of Lut far off from you;

(46) And thus will your Lord choose you and teach you the interpretation of sayings and make His favor complete to you and to the children of Yaqoub, as He made it complete before to your fathers, Ibrahim and Ishaq; surely your Lord is Knowing, Wise.

(47) And there came travellers and they sent their water-drawer and he let down his bucket. He said: O good news! this is a youth; and they concealed him as an article of merchandise, and Allah knew what they did.

(48) And of the two (prisoners) he who had found deliverance and remembered after a long time said: I will inform you of its interpretation, so let me go:

(49) He said: I will by no means send him with you until you give me a firm covenant in Allah's name that you will most certainly bring him back to me, unless you are completely surrounded. And when they gave him their covenant, he said: Allah is the One in Whom trust is placed as regards what we say.

(50) And he said: O my sons! do not (all) enter by one gate and enter by different gates and I cannot avail you aught against Allah; judgment is only Allah's; on Him do I rely, and on Him let those who are reliant rely.