The word(s) "occur" appears 19 time(s) in 18 verse(s) in Quran in Saheeh International translation.

(1) And do not marry those [women] whom your fathers married, except what has already occurred. Indeed, it was an immorality and hateful [to Allah] and was evil as a way.

(2) Prohibited to you [for marriage] are your mothers, your daughters, your sisters, your father's sisters, your mother's sisters, your brother's daughters, your sister's daughters, your [milk] mothers who nursed you, your sisters through nursing, your wives' mothers, and your step-daughters under your guardianship [born] of your wives unto whom you have gone in. But if you have not gone in unto them, there is no sin upon you. And [also prohibited are] the wives of your sons who are from your [own] loins, and that you take [in marriage] two sisters simultaneously, except for what has already occurred. Indeed, Allah is ever Forgiving and Merciful.

(3) Say to those who have disbelieved [that] if they cease, what has previously occurred will be forgiven for them. But if they return [to hostility] - then the precedent of the former [rebellious] peoples has already taken place.

(4) Then is it that when it has [actually] occurred you will believe in it? Now? And you were [once] for it impatient

(5) So do they wait except for like [what occurred in] the days of those who passed on before them? Say, "Then wait; indeed, I am with you among those who wait."

(6) They impatiently urge you to bring about evil before good, while there has already occurred before them similar punishments [to what they demand]. And indeed, your Lord is full of forgiveness for the people despite their wrongdoing, and indeed, your Lord is severe in penalty.

(7) They will not believe in it, while there has already occurred the precedent of the former peoples.

(8) And I do not think the Hour will occur. And even if I should be brought back to my Lord, I will surely find better than this as a return."

(9) And why did you, when you entered your garden, not say, 'What Allah willed [has occurred]; there is no power except in Allah '? Although you see me less than you in wealth and children,

(10) [That occurred] when the messengers had come to them before them and after them, [saying], "Worship not except Allah." They said, "If our Lord had willed, He would have sent down the angels, so indeed we, in that with which you have been sent, are disbelievers."