Hazrat Ibn Umar (may Allah be pleased with them both) used to recite the Du'a Qunoot only after the middle of Ramadan.

It is narrated similarly through another chain.

Hazrat Ali (may Allah be pleased with him) used to recite the Du'a Qunoot after the middle of Ramadan.

Hasan narrates that Ubayy led the people in prayer during the caliphate of Umar. He did not recite the Qunoot supplication in prayer until half of Ramadan had passed. When half of Ramadan had passed, he recited the Qunoot supplication after bowing (ruku‘). When the last ten days began, he left and separated himself from the people. Then, during the caliphate of Umar, Mu‘adh al-Qari used to lead them in prayer during the last ten days.

Hazrat Ibn Jurayj says that I asked Hazrat Ata about the Qunoot in Ramadan, so he said that after the middle of Ramadan, Hazrat Umar was the first to recite the Qunoot. I asked, "Was it observed more in the last half of Ramadan?" He replied, "Yes."

Hazrat Abad bin Rashid says that Hasan used to recite the Du'a Qunoot after the middle of Ramadan.

Hazrat Muhallab bin Abi Habibah says that I asked Hazrat Saeed bin Abi Al-Hasan about Qunoot, so he said that after the middle of Ramadan, the supplication of Qunoot will be recited, and this is what we have been taught.

Hazrat A'mash says that Yahya used to recite the Du'a Qunoot in Witr after the middle of Ramadan.

Ibrahim used to say that reciting Qunoot in Witr throughout the year is Sunnah. Ibn Sirin was of the opinion that Qunoot should be recited in Witr only after half of Ramadan.

7121 - He said: And Ibn Sirin would not see it except in the middle of Ramadan.