Al-Baqarah 2:104

Ya ayyuha allatheena amanoola taqooloo raAAina waqooloo onthurnawasmaAAoo walilkafireena AAathabun aleem

O you who have believed, say not [to Allāh's Messenger], "Rāʿinā" but say, "Unẓurnā" and listen. And for the disbelievers is a painful punishment.

O you who believe, do not say Rā‘inā, but say UnZurnā, and listen, as there is a grievous punishment for the unbelievers.