The word(s) "ought" appears 153 time(s) in 146 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) When We shook the Mount over them, as if it had been a canopy, and they thought it was going to fall on them (We said): "Hold firmly to what We have given you, and bring (ever) to remembrance what is therein; perchance ye may fear Allah."

(32) Those who fear Allah, when a thought of evil from Satan assaults them, bring Allah to remembrance, when lo! they see (aright)!

(33) Those who believed, and adopted exile, and fought for the Faith, with their property and their persons, in the cause of Allah, as well as those who gave (them) asylum and aid,- these are (all) friends and protectors, one of another. As to those who believed but came not into exile, ye owe no duty of protection to them until they come into exile; but if they seek your aid in religion, it is your duty to help them, except against a people with whom ye have a treaty of mutual alliance. And (remember) Allah seeth all that ye do.

(34) Know they not that Allah doth know their secret (thoughts) and their secret counsels, and that Allah knoweth well all things unseen?

(35) They will present their excuses to you when ye return to them. Say thou: "Present no excuses: we shall not believe you: Allah hath already informed us of the true state of matters concerning you: It is your actions that Allah and His Messenger will observe: in the end will ye be brought back to Him Who knoweth what is hidden and what is open: then will He show you the truth of all that ye did."

(36) And say: "Work (righteousness): Soon will Allah observe your work, and His Messenger, and the Believers: Soon will ye be brought back to the knower of what is hidden and what is open: then will He show you the truth of all that ye did."

(37) There will every soul prove (the fruits of) the deeds it sent before: they will be brought back to Allah their rightful Lord, and their invented falsehoods will leave them in the lurch.

(38) It is He Who giveth life and who taketh it, and to Him shall ye all be brought back.

(39) Then after him We sent (many) messengers to their peoples: they brought them Clear Signs, but they would not believe what they had already rejected beforehand. Thus do We seal the hearts of the transgressors.

(40) When they had had their throw, Moses said: "What ye have brought is sorcery: Allah will surely make it of no effect: for Allah prospereth not the work of those who make mischief.