Narrated Thawban: The Prophet ﷺ said: For each forgetfulness there are two prostrations after giving the salutation. No one except Amr (ibn Uthman) mentioned the words "from his father" (in the chain Abdur Rahman ibn Jubayr ibn Nufayr from Thawban).

Narrated Ubayy ibn Kab: Al-Hasan reported: Umar ibn al-Khattab gathered the people (in tarawih prayer) behind Ubayy ibn Kab (who led them). He used to lead them for twenty days (during Ramadan, and would not recite the supplication except in the second half of it (i. e. Ramadan). When the last ten days remained, he kept away from them, and prayed in his house. They used to say: Ubayy ran away. Abu Dawud said: This tradition shows that whatever has been reported about the recitation of the supplication is not tenable. Moreover, these two traditions from Ubayy bin Kab indicate that another tradition which tells that the Prophet ﷺ recited the supplication in the witr is weak.