The word(s) "discourse" appears 4 time(s) in 4 verse(s) in Quran in Saheeh International translation.

(1) And when you see those who engage in [offensive] discourse concerning Our verses, then turn away from them until they enter into another conversation. And if Satan should cause you to forget, then do not remain after the reminder with the wrongdoing people.

(2) And they did not appraise Allah with true appraisal when they said, "Allah did not reveal to a human being anything." Say, "Who revealed the Scripture that Moses brought as light and guidance to the people? You [Jews] make it into pages, disclosing [some of] it and concealing much. And you were taught that which you knew not - neither you nor your fathers." Say, "Allah [revealed it]." Then leave them in their [empty] discourse, amusing themselves.

(3) Who are in [empty] discourse amusing themselves.

(4) And we used to enter into vain discourse with those who engaged [in it],