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

(121) And when the children among you come to puberty, then let them (also) ask for permission, as those senior to them (in age). Thus Allah makes clear His Ayat (Commandments and legal obligations) for you. And Allah is All-Knowing, All-Wise.

(122) Make not the calling of the Messenger (Muhammad صلى الله عليه وسلم) among you as your calling one of another. Allah knows those of you who slip away under shelter (of some excuse without taking the permission to leave, from the Messenger (صلى الله عليه وسلم). And let those who oppose the Messenger's (Muhammad صلى الله عليه وسلم) commandment (i.e. his Sunnah - legal ways, orders, acts of worship, statements) (among the sects) beware, lest some Fitnah (disbelief, trials, afflictions, earthquakes, killing, overpowered by a tyrant) should befall them or a painful torment be inflicted on them.

(123) And it is He Who has let free the two seas (kinds of water): this is palatable and sweet, and that is salt and bitter; and He has set a barrier and a complete partition between them.

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

(125) Tell Me, (even) if We do let them enjoy for years,

(126) Ta-Sin. [These letters are one of the miracles of the Qur'an, and none but Allah (Alone) knows their meanings]. These are the Verses of the Qur'an, and (it is) a Book (that makes things) clear:

(127) "Go you with this letter of mine, and deliver it to them, then draw back from them, and see what (answer) they return."

(128) She said: "O chiefs! Verily! Here is delivered to me a noble letter,

(129) Nay, they have no knowledge of the Hereafter. Nay, they are in doubt about it. Nay, they are in complete blindness about it.

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