The word(s) "righteousness" appears 36 time(s) in 36 verse(s) in Quran in Mohsin Khan translation.

(21) 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.

(22) 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).

(23) Those who believed (in the Oneness of Allah - Islamic Monotheism), and work righteousness, Tuba (all kinds of happiness or name of a tree in Paradise) is for them and a beautiful place of (final) return.

(24) Whoever works righteousness - whether male or female - while he (or she) is a true believer (of Islamic Monotheism) verily, to him We will give a good life (in this world with respect, contentment and lawful provision), and We shall pay them certainly a reward in proportion to the best of what they used to do (i.e. Paradise in the Hereafter).

(25) Verily, this Qur'an guides to that which is most just and right and gives glad tidings to the believers (in the Oneness of Allah and His Messenger, Muhammad صلى الله عليه و سلم), who work deeds of righteousness, that they shall have a great reward (Paradise).

(26) "So we intended that their Lord should change him for them for one better in righteousness and nearer to mercy.

(27) "But as for him who believes (in Allah's Oneness) and works righteousness, he shall have the best reward, (Paradise), and we (Dhul-Qarnain) shall speak unto him mild words (as instructions)."

(28) Say (O Muhammad صلى الله عليه وسلم): "I am only a man like you. It has been revealed to me that your Ilah (God) is One Ilah (God - i.e. Allah). So whoever hopes for the Meeting with his Lord, let him work righteousness and associate none as a partner in the worship of his Lord."

(29) Except those who repent and believe (in the Oneness of Allah and His Messenger Muhammad صلى الله عليه وسلم), and work righteousness. Such will enter Paradise and they will not be wronged in aught.

(30) Verily, those who believe [in the Oneness of Allah and in His Messenger (Muhammad صلى الله عليه وسلم)] and work deeds of righteousness, the Most Gracious (Allah) will bestow love for them (in the hearts of the believers).