The word(s) "sudden" appears 14 time(s) in 14 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And when you are among them and keep up the prayer for them, let a party of them stand up with you, and let them take their arms; then when they have prostrated themselves let them go to your rear, and let another party who have not prayed come forward and pray with you, and let them take their precautions and their arms; (for) those who disbelieve desire that you may be careless of your arms and your luggage, so that they may then turn upon you with a sudden united attack, and there is no blame on you, if you are annoyed with rain or if you are sick, that you lay down your arms, and take your precautions; surely Allah has prepared a disgraceful chastisement for the unbelievers.

(2) They are losers indeed who reject the meeting of Allah; until when the hour comes upon them all of a sudden they shall say: O our grief for our neglecting it! and they shall bear their burdens on their backs; now surely evil is that which they bear.

(3) But when they neglected that with which they had been admonished, We opened for them the doors of all things, until when they rejoiced in what they were given We seized them suddenly; then lo! they were in utter despair.

(4) Say: Have you considered if the chastisement of Allah should overtake you suddenly or openly, will any be destroyed but the unjust people?

(5) They ask you about the hour, when will be its taking place? Say: The knowledge of it is only with my Lord; none but He shall manifest it at its time; it will be momentous in the heavens and the earth; it will not come on you but of a sudden. They ask you as if you were solicitous about it. Say: Its knowledge is only with Allah, but most people do not know.

(6) Do they then feel secure that there may come to them an extensive chastisement from Allah or (that) the hour may come to them suddenly while they do not perceive?

(7) Nay, it shall come on them all of a sudden and cause them to become confounded, so they shall not have the power to avert it, nor shall they be respited.

(8) And those who disbelieve shall not cease to be in doubt concerning it until the hour overtakes them suddenly, or there comes on them the chastisement of a destructive day.

(9) And it shall come to them all of a sudden, while they shall not perceive;

(10) They said: Swear to each other by Allah that we will certainly make a sudden attack on him and his family by night, then we will say to his heir: We did not witness the destruction of his family, and we are most surely truthful.