The word(s) "threaten" appears 12 time(s) in 12 verse(s) in Quran in Mohsin Khan translation.

(11) Therefore be patient (O Muhammad صلى الله عليه وسلم) as did the Messengers of strong will and be in no haste about them (disbelievers). On the Day when they will see that (torment) with which they are promised (i.e. threatened, it will be) as if they had not stayed more than an hour in a single day. (O mankind! this Qur'an is sufficient as) a clear Message (or proclamation to save yourself from destruction). But shall any be destroyed except the people who are Al-Fasiqun (the rebellious against Allah's Command, the disobedient to Allah)?

(12) The people of Nuh (Noah) denied (their Messenger) before them. They rejected Our slave, and said: "A madman!" and he was insolently rebuked and threatened.