The word(s) "righteous" appears 184 time(s) in 178 verse(s) in Quran in Mohsin Khan translation.

(161) O you who believe! When you hold secret counsel, do it not for sin and wrong-doing, and disobedience towards the Messenger (Muhammad صلى الله عليه وسلم), but do it for Al-Birr (righteousness) and Taqwa (virtues and piety); and fear Allah unto Whom you shall be gathered.

(162) And be not like those who forgot Allah (i.e. became disobedient to Allah), and He caused them to forget their ownselves, (let them to forget to do righteous deeds). Those are the Fasiqun (rebellious, disobedient to Allah).

(163) And spend (in charity) of that with which We have provided you before death comes to one of you, and he says: "My Lord! If only You would give me respite for a little while (i.e. return to the worldly life), then I should give Sadaqah (i.e. Zakat ) of my wealth, and be among the righteous [i.e. perform Hajj (pilgrimage to Makkah) and other good deeds].

(164) (And remember) the Day when He will gather you (all) on the Day of Gathering, - that will be the Day of mutual loss and gain (i.e. loss for the disbelievers as they will enter the Hell-fire and gain for the believers as they will enter Paradise). And whosoever believes in Allah and performs righteous good deeds, He will expiate from him his sins, and will admit him to Gardens under which rivers flow (Paradise) to dwell therein forever; that will be the great success.

(165) (And has also sent to you) a Messenger (Muhammad صلى الله عليه وسلم), who recites to you the Verses of Allah (the Qur'an) containing clear explanations, that He may take out those who believe and do righteous good deeds, from the darkness (of polytheism and disbelief) to the light (of Islamic Monotheism). And whosoever believes in Allah and performs righteous good deeds, He will admit him into Gardens under which rivers flow (Paradise) to dwell therein forever. Allah has indeed granted for him an excellent provision.

(166) If you two (wives of the Prophet صلى الله عليه وسلم : 'Aishah and Hafsah رضي الله عنهما) turn in repentance to Allah, (it will be better for you), your hearts are indeed so inclined (to oppose what the Prophet صلى الله عليه وسلم likes); but if you help one another against him (Muhammad صلى الله عليه وسلم), then verily, Allah is his Maula (Lord, or Master, or Protector), and Jibril (Gabriel), and the righteous among the believers; and furthermore, the angels are his helpers.

(167) Allah sets forth an example for those who disbelieve: the wife of Nuh (Noah) and the wife of Lut (Lot). They were under two of our righteous slaves, but they both betrayed them (their husbands by rejecting their doctrine). So they [Nuh (Noah) and Lut (Lot) عليهما السلام] availed them (their respective wives) not against Allah and it was said: "Enter the Fire along with those who enter!"

(168) Shall We then treat the Muslims (believers of Islamic Monotheism, doers of righteous deeds) like the Mujrimun (criminals, polytheists and disbelievers, etc.)?

(169) Then his Lord chose him and made him of the righteous.

(170) 'There are among us some that are righteous, and some the contrary; we are groups having different ways (religious sects).