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

(231) And he who findeth not (the wherewithal), let him fast for two successive months before they touch one another; and for him who is unable to do so (the penance is) the feeding of sixty needy ones. This, that ye may put trust in Allah and His messenger. Such are the limits (imposed by Allah); and for disbelievers is a painful doom.

(232) Lo! Conspiracy is only of the devil, that he may vex those who believe; but he can harm them not at all unless by Allah's leave. In Allah let believers put their trust.

(233) (And the hypocrites are) on the likeness of the devil when he telleth man to disbelieve, then, when he disbelieveth saith: Lo! I am quit of thee. Lo! I fear Allah, the Lord of the Worlds.

(234) O ye who believe! Observe your duty to Allah. And let every soul look to that which it sendeth on before for the morrow. And observe your duty to Allah. Lo! Allah is Informed of what ye do.

(235) O ye who believe! When believing women come unto you as fugitives, examine them. Allah is Best Aware of their faith. Then, if ye know them for true believers, send them not back unto the disbelievers. They are not lawful for them (the disbelievers), nor are they (the disbelievers) lawful for them. And give them (the disbelievers) that which they have spent (upon them). And it is no sin for you to marry such women when ye have given them their dues. And hold not to the ties of disbelieving women; and ask for (the return of) that which ye have spent; and let them (the disbelievers) ask for that which they have spent. That is the judgment of Allah. He judgeth between you. Allah is Knower, Wise.

(236) He it is Who hath sent among the unlettered ones a messenger of their own, to recite unto them His revelations and to make them grow, and to teach them the Scripture and wisdom, though heretofore they were indeed in error manifest,

(237) O ye who believe! let not your wealth nor your children distract you from remembrance of Allah. Those who do so, they are the losers.

(238) No calamity befalleth save by Allah's leave. And whosoever believeth in Allah, He guideth his heart. And Allah is Knower of all things.

(239) Allah! There is no Allah save Him. In Allah, therefore, let believers put their trust.

(240) O Prophet! When ye (men) put away women, put them away for their (legal) period and reckon the period, and keep your duty to Allah, your Lord. Expel them not from their houses nor let them go forth unless they commit open immorality. Such are the limits (imposed by) Allah; and whoso transgresseth Allah's limits, he verily wrongeth his soul. Thou knowest not: it may be that Allah will afterward bring some new thing to pass.