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

(41) Say (O Muhammad صلى الله عليه وسلم): "(But) the things that my Lord has indeed forbidden are Al-Fawahish (great evil sins and every kind of unlawful sexual intercourse) whether committed openly or secretly, sins (of all kinds), unrighteous oppression, joining partners (in worship) with Allah for which He has given no authority, and saying things about Allah of which you have no knowledge."

(42) O Children of Adam! If there come to you Messengers from amongst you, reciting to you My Verses, then whosoever becomes pious and righteous, on them shall be no fear nor shall they grieve.

(43) But those who believed (in the Oneness of Allah - Islamic Monotheism), and worked righteousness - We tax not any person beyond his scope - such are the dwellers of Paradise. They will abide therein.

(44) I shall turn away from My Ayat (verses of the Qur'an) those who behave arrogantly on the earth, without a right, and (even) if they see all the Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.), they will not believe in them. And if they see the way of righteousness (monotheism, piety, and good deeds), they will not adopt it as the Way, but if they see the way of error (polytheism, crimes and evil deeds), they will adopt that way, that is because they have rejected Our Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and were heedless (to learn a lesson) from them.

(45) And We have broken them (i.e. the Jews) up into various separate groups on the earth: some of them are righteous and some are away from that. And We tried them with good (blessings) and evil (calamities) in order that they might turn (to Allah's Obedience).

(46) And as to those who hold fast to the Book (i.e. act on its teachings) and perform As-Salat (Iqamat-as-Salat ), certainly We shall never waste the reward of those who do righteous deeds.

(47) Verily, my Wali (Protector, Supporter, and Helper) is Allah Who has revealed the Book (the Qur'an), and He protects (supports and helps) the righteous.

(48) In order that Allah may distinguish the wicked (disbelievers, polytheists and doers of evil deeds) from the good (believers of Islamic Monotheism and doers of righteous deeds), and put the wicked (disbelievers, polytheists and doers of evil deeds) one over another, heap them together and cast them into Hell. Those! it is they who are the losers.

(49) And of them are some who made a covenant with Allah (saying): "If He bestowed on us of His Bounty, we will verily give Sadaqah (Zakat and voluntary charity in Allah's Cause) and will be certainly among those who are righteous."

(50) And (there are) others who have acknowledged their sins, they have mixed a deed that was righteous with another that was evil. Perhaps Allah will turn unto them in forgiveness. Surely, Allah is Oft-Forgiving, Most Merciful.