The word(s) "let" appears 320 time(s) in 279 verse(s) in Quran in Muhammad Pickthal translation.

(131) Say: I am only a mortal like you. My Lord inspireth in me that your Allah is only One Allah. And whoever hopeth for the meeting with his Lord, let him do righteous work, and make none sharer of the worship due unto his Lord.

(132) Then (one) cried unto her from below her, saying: Grieve not! Thy Lord hath placed a rivulet beneath thee,

(133) Therefor, let not him turn thee aside from (the thought of) it who believeth not therein but followeth his own desire, lest thou perish.

(134) And let him share my task,

(135) So go ye unto him and say: Lo! we are two messengers of thy Lord. So let the children of Israel go with us, and torment them not. We bring thee a token from thy Lord. And peace will be for him who followeth right guidance.

(136) (Moses) said: Your tryst shall be the day of the feast, and let the people assemble when the sun hath risen high.

(137) 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.

(138) They said: O Moses! Either throw first, or let us be the first to throw?

(139) On that day no intercession availeth save (that of) him unto whom the Beneficent hath given leave and whose word He accepteth.

(140) Therefor we said: O Adam! This is an enemy unto thee and unto thy wife, so let him not drive you both out of the Garden so that thou come to toil.