The word(s) "one" appears 1001 time(s) in 857 verse(s) in Quran in Abdullah Yusuf Ali translation.

(641) But when they saw Our Punishment, they said: "We believe in Allah,- the one Allah - and we reject the partners we used to join with Him."

(642) Say thou: "I am but a man like you: It is revealed to me by Inspiration, that your Allah is one Allah: so stand true to Him, and ask for His Forgiveness." And woe to those who join gods with Allah,-

(643) Behold, the messengers came to them, from before them and behind them, (preaching): "Serve none but Allah." They said, "If our Lord had so pleased, He would certainly have sent down angels (to preach). Now we reject your mission (altogether)."

(644) "A hospitable gift from one Oft-Forgiving, Most Merciful!"

(645) Who is better in speech than one who calls (men) to Allah, works righteousness, and says, "I am of those who bow in Islam"?

(646) And no one will be granted such goodness except those who exercise patience and self-restraint,- none but persons of the greatest good fortune.

(647) And if (at any time) an incitement to discord is made to thee by the Evil one, seek refuge in Allah. He is the one Who hears and knows all things.

(648) No falsehood can approach it from before or behind it: It is sent down by one Full of Wisdom, Worthy of all Praise.

(649) To Him is referred the Knowledge of the Hour (of Judgment: He knows all): No date-fruit comes out of its sheath, nor does a female conceive (within her womb) nor bring forth the Day that (Allah) will propound to them the (question), "Where are the partners (ye attributed to Me?" They will say, "We do assure thee not one of us can bear witness!"

(650) Say: "See ye if the (Revelation) is (really) from Allah, and yet do ye reject it? Who is more astray than one who is in a schism far (from any purpose)?"