6 verses have
promise
in Edition Clear Qur'an by Talal Itani / Al-Anbiyaa (The Prophets)

21:9Then We fulfilled Our promise to them, and We saved them together with whomever We willed, and We destroyed the extravagant.

21:38And they say, “When will this promise come true, if you are truthful?”

21:97The promise of truth has drawn near. The eyes of those who disbelieved will stare in horror: “Woe to us. We were oblivious to this. In fact, we were wrongdoers.”

21:103The Supreme Fear will not worry them, and the angels will receive them: “This is your Day which you were promised.”

21:104On the Day when We fold the heaven, like the folding of a book. Just as We began the first creation, We will repeat it—a promise binding on Us. We will act.

21:109But if they turn away, say, “I have informed you sufficiently. Although I do not know whether what you are promised is near or far.”