The word(s) "ought" appears 205 time(s) in 189 verse(s) in Quran in Mohsin Khan translation.

(91) They said: "Have you brought us the truth, or are you one of those who play about?"

(92) Then they turned to themselves (their first thought and said): "Indeed you [Ibrahim (Abraham)] know well that these (idols) speak not!"

(93) He (Muhammad صلى الله عليه وسلم) said: "My Lord! Judge You in truth! Our Lord is the Most Gracious, Whose Help is to be sought against that which you attribute (unto Allah that He has offspring, and unto Muhammad صلى الله عليه وسلم that he is a sorcerer, and unto the Qur'an that it is poetry)!"

(94) O mankind! If you are in doubt about the Resurrection, then verily We have created you (i.e. Adam) from dust, then from a Nutfah (mixed drops of male and female sexual discharge i.e. the offspring of Adam), then from a clot (a piece of thick coagulated blood) then from a little lump of flesh - some formed and some unformed (as in the case of miscarriage) - that We may make (it) clear to you (i.e. to show you Our Power and Ability to do what We will). And We cause whom We will to remain in the wombs for an appointed term, then We bring you out as infants, then (give you growth) that you may reach your age of full strength. And among you there is he who dies (young), and among you there is he who is brought back to the miserable old age, so that he knows nothing after having known. And you see the earth barren, but when We send down water (rain) on it, it is stirred (to life), and it swells and puts forth every lovely kind (of growth).

(95) In them (cattle offered for sacrifice) are benefits for you for an appointed term, and afterwards they are brought for sacrifice unto the ancient House (the Haram - sacred territory of Makkah).

(96) Permission to fight (against disbelievers) is given to those (believers) who are fought against, because they have been wronged; and surely, Allah is Able to give them (believers) victory -

(97) O mankind! A similitude has been coined, so listen to it (carefully): Verily those on whom you call besides Allah, cannot create (even) a fly, even though they combine together for the purpose. And if the fly snatches away a thing from them, they will have no power to release it from the fly. So weak are (both) the seeker and the sought.

(98) And strive hard in Allah's Cause as you ought to strive (with sincerity and with all your efforts that His Name should be superior). He has chosen you (to convey His Message of Islamic Monotheism to mankind by inviting them to His religion of Islam), and has not laid upon you in religion any hardship: it is the religion of your father Ibrahim (Abraham) (Islamic Monotheism). It is He (Allah) Who has named you Muslims both before and in this (the Qur'an), that the Messenger (Muhammad صلى الله عليه وسلم) may be a witness over you and you be witnesses over mankind! So perform As-Salat (Iqamat-as-Salat), give Zakat and hold fast to Allah [i.e. have confidence in Allah, and depend upon Him in all your affairs]. He is your Maula (Patron, Lord), what an Excellent Maula (Patron, Lord) and what an Excellent Helper!

(99) Then We made the Nutfah into a clot (a piece of thick coagulated blood), then We made the clot into a little lump of flesh, then We made out of that little lump of flesh bones, then We clothed the bones with flesh, and then We brought it forth as another creation. So Blessed is Allah, the Best of creators.

(100) Then We brought forth for you therewith gardens of date-palms and grapes, wherein is much fruit for you, and whereof you eat.