As Salamu Alaikum wa Rahmatullahi wa Barakatuhu
Some of the Imams continuously make the supplication of Al-Qunut in the Witr Prayer every night. Has this been reported from our Salaf?
There is no harm in that. Rather it is Sunnah, because when the Prophet (Sallallahu Alayhi wa Sallam) taught Al-Hasan bin Ali (Radhi Allahu Anhuma) for the Witr Prayer, he did not order him to leave it off sometimes and not to always say it. This proves that both matters are permissible. For this reason it is confirmed from Ubayy bin Ka’b (Radhi Allahu Anhu) that when he would lead the Companions (Radhi Allahu Anhum) in Prayer in the Masjid of the Messenger of Allah (Sallallahu Alayhi wa Sallam) he would leave off Al-Qunut some nights. This was probably so that he could teach the people that it was not obligatory. And Allah is the Giver of success.
Shaikh Ibn Baz (Rahimahullah)
Reference: Fatawa Islamiyah Volume 3 Page 322