The word(s) "obedience" appears 67 time(s) in 66 verse(s) in Quran in Mohsin Khan translation.

(41) Evil (sins and disobedience to Allah) has appeared on land and sea because of what the hands of men have earned (by oppression and evil deeds), that He (Allah) may make them taste a part of that which they have done, in order that they may return (by repenting to Allah, and begging His Pardon).

(42) So set you (O Muhammad صلى الله عليه وسلم) your face (in obedience to Allah, your Lord) to the straight and right religion (Islamic Monotheism), before there comes from Allah a Day which none can avert. On that Day men shall be divided [(in two groups), a group in Paradise and a group in Hell].

(43) But if they (both) strive with you to make you join in worship with Me others that of which you have no knowledge, then obey them not; but behave with them in the world kindly, and follow the path of him who turns to Me in repentance and in obedience. Then to Me will be your return, and I shall tell you what you used to do.

(44) See they not what is before them and what is behind them, of the heaven and the earth? If We will, We shall sink the earth with them, or cause a piece of the heaven to fall upon them. Verily, in this is a sign for every slave who turns to Allah in repentance (i.e. the one who believes in the Oneness of Allah and performs deeds of His obedience and always begs His Pardon).

(45) But they turned away (from the obedience of Allah), so We sent against them Sail Al-'Arim (flood released from the dam), and We converted their two gardens into gardens producing bitter bad fruit, and tamarisks, and some few lote-trees.

(46) And you will be requited nothing except for what you used to do (evil deeds, sins, and Allah's disobedience which you used to do in this world)

(47) And indeed, We did try Sulaiman (Solomon) and We placed on his throne Jasad (a devil, so he lost his kingdom for a while) and he did return (to Allah with obedience and in repentance, and to his throne and kingdom by the Grace of Allah).

(48) Surely the religion (i.e. the worship and the obedience) is for Allah only. And those who take Auliya' (protectors, helpers, lords, gods) besides Him (say): "We worship them only that they may bring us near to Allah." Verily Allah will judge between them concerning that wherein they differ. Truly, Allah guides not him who is a liar, and a disbeliever.

(49) "And turn in repentance and in obedience with true Faith (Islamic Monotheism) to your Lord and submit to Him (in Islam) before the torment comes upon you, (and) then you will not be helped.

(50) It is He Who shows you His Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) and sends down (rain with which grows) provision for you from the sky. And none remembers but those who turn (to Allah in obedience and) in repentance (by begging His Pardon and by worshipping and obeying Him Alone and none else).