3 verses have
believers
in Edition Clear Qur'an by Talal Itani / Al-Kahf (The Cave)

18:2Valuable—to warn of severe punishment from Himself; and to deliver good news to the believers who do righteous deeds, that they will have an excellent reward.

18:80As for the boy, his parents were believers, and we feared he would overwhelm them with oppression and disbelief.

18:100On that Day, We will present the disbelievers to Hell, all displayed.