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

(51) It was not becoming of the people of Al-Madinah and the bedouins of the neighbourhood to remain behind Allah's Messenger (Muhammad صلى الله عليه وسلم when fighting in Allah's Cause) and (it was not becoming of them) to prefer their own lives to his life. That is because they suffer neither thirst nor fatigue, nor hunger in the Cause of Allah, nor they take any step to raise the anger of disbelievers nor inflict any injury upon an enemy but is written to their credit as a deed of righteousness. Surely, Allah wastes not the reward of the Muhsinun

(52) To Him is the return of all of you. The Promise of Allah is true. It is He Who begins the creation and then will repeat it, that He may reward with justice those who believed (in the Oneness of Allah - Islamic Monotheism) and did deeds of righteousness. But those who disbelieved will have a drink of boiling fluids and painful torment because they used to disbelieve.

(53) Verily, those who believe, and do deeds of righteousness, their Lord will guide them through their Faith; under them will flow rivers in the Gardens of Delight (Paradise).

(54) Allah calls to the Home of Peace (i.e. Paradise, by accepting Allah's religion of Islamic Monotheism and by doing righteous good deeds and abstaining from polytheism and evil deeds) and guides whom He wills to the Straight Path.

(55) Those who believed (in the Oneness of Allah - Islamic Monotheism), and used to fear Allah much (by abstaining from evil deeds and sins and by doing righteous deeds).

(56) For them are glad tidings, in the life of the present world (i.e. through a righteous dream seen by the person himself or shown to others), and in the Hereafter. No change can there be in the Words of Allah. This is indeed the supreme success.

(57) Except those who show patience and do righteous good deeds: those, theirs will be forgiveness and a great reward (Paradise).

(58) Verily, those who believe (in the Oneness of Allah - Islamic Monotheism) and do righteous good deeds, and humble themselves (in repentance and obedience) before their Lord, they will be dwellers of Paradise to dwell therein forever.

(59) He said: "O Nuh (Noah)! Surely, he is not of your family; verily, his work is unrighteous, so ask not of Me that of which you have no knowledge! I admonish you lest you should be one of the ignorant."

(60) "Kill Yusuf (Joseph) or cast him out to some (other) land, so that the favour of your father may be given to you alone, and after that you will be righteous folk (by intending repentance before committing the sin)."