Reminder to Imāms: Qunūt An-Nāzilah should be said during the Jumu'ah Khuṭbah - not in the prayer.

This is an example from today's Khuṭbah by Sheikh Abdulḥamīd ḥafidhahullāh. Reminder to attendees: You should remain silent throughout the Khuṭbah, even when the Imām makes du’ā.