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

(111) Whether We let thee see something of that which We have promised them, or make thee die (before its happening), thine is but conveyance (of the message). Ours the reckoning.

(112) Their messengers said: Can there be doubt concerning Allah, the Creator of the heavens and the earth? He calleth you that He may forgive you your sins and reprieve you unto an appointed term. They said: Ye are but mortals like us, who would fain turn us away from what our fathers used to worship. Then bring some clear warrant.

(113) Their messengers said unto them: We are but mortals like you, but Allah giveth grace unto whom He will of His slaves. It is not ours to bring you a warrant unless by the permission of Allah. In Allah let believers put their trust!

(114) How should we not put our trust in Allah when He hath shown us our ways? We surely will endure the hurt ye do us. In Allah let the trusting put their trust.

(115) let them eat and enjoy life, and let (false) hope beguile them. They will come to know!

(116) Save him who stealeth the hearing, and them doth a clear flame pursue.

(117) He said: O Iblis! What aileth thee that thou art not among the prostrate?

(118) So travel with thy household in a portion of the night, and follow thou their backs. let none of you turn round, but go whither ye are commanded.

(119) And be not like unto her who unravelleth the thread, after she hath made it strong, to thin filaments, making your oaths a deceit between you because of a nation being more numerous than (another) nation. Allah only trieth you thereby, and He verily will explain to you on the Day of Resurrection that wherein ye differed.

(120) And when We put a revelation in place of (another) revelation, - and Allah knoweth best what He revealeth - they say: Lo! thou art but inventing. Most of them know not.