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

(151) And you will see them brought forward to it (Hell) made humble by disgrace, (and) looking with stealthy glance. And those who believe will say: "Verily, the losers are they who lose themselves and their families on the Day of Resurrection. Verily, the Zalimun [i.e. Al-Kafirun (disbelievers in Allah, in His Oneness and in His Messenger صلى الله عليه و سلم, polytheists, wrong-doers)] will be in a lasting torment. (Tafsir At-Tabari).

(152) But if they turn away (O Muhammad صلى الله عليه و سلم from the Islamic Monotheism, which you have brought to them). We have not sent you (O Muhammad صلى الله عليه و سلم) as a Hafiz (watcher, protector) over them (i.e. to take care of their deeds and to recompense them). Your duty is to convey (the Message). And verily, when We cause man to taste of Mercy from Us, he rejoices thereat; but when some ill befalls them because of the deeds which their hands have sent forth, then verily, man (becomes) ingrate!

(153) And Who sends down water (rain) from the sky in due measure, then We revive a dead land therewith, and even so you will be brought forth (from the graves).

(154) (Like they then for Allah) a creature who is brought up in adornments (wearing silk and gold ornaments, i.e. women), and who in dispute cannot make herself clear?

(155) Indeed We have brought the truth (Muhammad صلى الله عليه و سلم with the Qur'an) to you, but most of you have a hatred for the truth.

(156) O our people! Respond (with obedience) to Allah's Caller (i.e. Allah's Messenger Muhammad صلى الله عليه وسلم), and believe in him (i.e. believe in that which Muhammad صلى الله عليه وسلم has brought from Allah and follow him). He (Allah) will forgive you of your sins, and will save you from a painful torment (i.e. Hell-fire)

(157) And that He may punish the Munafiqun (hypocrites), men and women, and also the Mushrikun men and women, who think evil thoughts about Allah: for them is a disgraceful torment. And the Anger of Allah is upon them, and He has cursed them and prepared Hell for them - and worst indeed is that destination.

(158) "Nay, but you thought that the Messenger (صلى الله عليه وسلم) and the believers would never return to their families, and that was made fair-seeming in your hearts, and you did think an evil thought and you became a useless people going for destruction."

(159) And Paradise will be brought near to the Muttaqun (the pious. See V.2:2), not far off.

(160) "Who feared the Most Gracious (Allah) in the Ghaib (Unseen) and brought a heart turned in repentance (to Him and absolutely free from each and every kind of polytheism).