Mujahid says: I and Urwah bin Zubair entered the mosque, where Sayyiduna Abdullah bin Umar (may Allah be pleased with him) was also present. We sat with him. There were some people performing the Duha prayer there. We said: O Abu Abdur Rahman! What prayer is this? He said: This is an innovation (bid’ah). We asked: How many Umrahs did the Messenger of Allah (peace and blessings be upon him) perform? He said: Four, and one of them was in Rajab. Hearing this, we felt shy to point out his mistake. Meanwhile, we heard the sound of Umm al-Mu’minin Sayyidah Aisha (may Allah be pleased with her) using the miswak. Urwah bin Zubair said to her: Umm al-Mu’minin! Do you not hear what Abu Abdur Rahman is saying? He is saying that the Messenger of Allah (peace and blessings be upon him) performed four Umrahs and one of them was in Rajab. Upon hearing this, she said: May Allah have mercy on Abu Abdur Rahman. Whenever the Prophet (peace and blessings be upon him) performed Umrah, he was present at that occasion. In any case, the Prophet (peace and blessings be upon him) did not perform any Umrah in Rajab.
Hadith Referenceالفتح الربانی / كتاب الحج والعمرة / 4121
Benefits: ...... The Duha prayer (Salat al-Duha) is a Sunnah and a virtuous act. What is meant by Sayyiduna Ibn Umar radi Allahu anhu calling it an innovation (bid‘ah) is the practice of performing this prayer openly in the mosque and gathering together to perform it. His intention was that any act which was carried out in a particular manner during the Prophetic era should be preserved in that same state. The following narration supports this interpretation: Sayyiduna Abdullah ibn Mas‘ud radi Allahu anhu saw some people gathered in the mosque performing the Duha prayer together; he objected to this and said: If this prayer must be performed, then perform it in your homes. (Ibn Abi Shaybah: 2/405)