It was asked from Sayyiduna Anas bin Malik (may Allah be pleased with him): Did the Messenger of Allah (peace and blessings be upon him) recite Qunoot in the Fajr prayer? He replied: Yes. It was asked or (he said): I said, was it before or after bowing (ruku‘)? He said: For a few days, after bowing. Imam Darimi (may Allah have mercy on him) said: I am an adherent and practitioner of this, and in my opinion, this Qunoot is only prescribed during times of war.
Hadith Referenceسنن دارمي / من كتاب الصللاة / 1638