Sunan Ibn Majah 1207
سنن ابن ماجه#1207SahihIt was narrated from ‘Abdur-Rahman Al-A’raj that Ibn Buhainah told him that the Prophet (ﷺ) stood up in the second Rak’ah of Zuhr and forgot to sit. When he had finished his prayer, and before he said the Salam, he performed the two prostrations for forgetfulness (Sahw) and said the Salam
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih
In-book reference: 5:405