The word(s) "one god" appears 1 time(s) in 57 verse(s) in Quran in Mohsin Khan translation.

(1) Or were you witnesses when death approached Ya'qub (Jacob)? When he said unto his sons, "What will you worship after me?" They said, "We shall worship your Ilah (god - Allah), the Ilah (god) of your fathers, Ibrahim (Abraham), Isma'il (Ishmael), Ishaq (Isaac), one Ilah (god), and to Him we submit (in Islam)."

(2) And your Ilah (god) is one Ilah (god - Allah), La ilaha illa Huwa (there is none who has the right to be worshipped but He), the Most Gracious, the Most Merciful.

(3) Verily! This is the true narrative [about the story of 'Îsa (Jesus)], and La ilaha illallah (none has the right to be worshipped but Allah, the one and the Only True god, Who has neither a wife nor a son). And indeed, Allah is the All-Mighty, the All-Wise.

(4) O people of the Scripture (Christians)! Do not exceed the limits in your religion, nor say of Allah aught but the truth. The Messiah 'Îsa (Jesus), son of Maryam (Mary), was (no more than) a Messenger of Allah and His Word, ("Be!" - and he was) which He bestowed on Maryam (Mary) and a spirit (Ruh ) created by Him; so believe in Allah and His Messengers. Say not: "Three (trinity)!" Cease! (it is) better for you. For Allah is (the only) one Ilah (god), glory be to Him (Far Exalted is He) above having a son. To Him belongs all that is in the heavens and all that is in the earth. And Allah is All-Sufficient as a Disposer of affairs.

(5) Surely, disbelievers are those who said: "Allah is the third of the three (in a Trinity)." But there is no Ilah (god) (none who has the right to be worshipped) but one Ilah (god -Allah). And if they cease not from what they say, verily, a painful torment will befall on the disbelievers among them.

(6) Say (O Muhammad صلى الله عليه وسلم): "To whom belongs all that is in the heavens and the earth?" Say: "To Allah. He has prescribed Mercy for Himself. Indeed He will gather you together on the Day of Resurrection, about which there is no doubt. Those who have lost themselves will not believe [in Allah as being the only Ilah (god), and Muhammad صلى الله عليه وسلم as being one of His Messengers, and in Resurrection].

(7) Say (O Muhammad صلى الله عليه وسلم): "Shall I take as a Wali (Helper, Protector, Lord or god) any other than Allah, the Creator of the heavens and the earth? And it is He Who feeds but is not fed." Say: "Verily, I am commanded to be the first of those who submit themselves to Allah (as Muslims)." And be not you (O Muhammad صلى الله عليه وسلم) of the Mushrikun [polytheists, pagans, idolaters and disbelievers in the oneness of Allah]. (Tafsir Al-Qurtubi)

(8) Say (O Muhammad صلى الله عليه وسلم): "What thing is the most great in witness?" Say: "Allah (the Most Great!) is Witness between me and you; this Qur'an has been revealed to me that I may therewith warn you and whomsoever it may reach. Can you verily bear witness that besides Allah there are other alihah (gods)?" Say "I bear no (such) witness!" Say: "But in truth He (Allah) is the only one Ilah (god). And truly I am innocent of what you join in worship with Him."

(9) Say (O Muhammad صلى الله عليه وسلم): "Truly, my Lord has guided me to a Straight Path, a right religion, the religion of Ibrahim (Abraham), Hanifa [i.e. the true Islamic Monotheism - to believe in one god (Allah i.e. to worship none but Allah, Alone)] and he was not of Al-Mushrikun (See V.2:105)."

(10) Indeed, We sent Nuh (Noah) to his people and he said: "O my people! Worship Allah! You have no other Ilah (god) but Him. (La ilaha illallah: none has the right to be worshipped but Allah). Certainly, I fear for you the torment of a Great Day!"