Sunan Ibn Majah 1219
سنن ابن ماجه#1219HasanIt was narrated that Thawban said:“I heard the Messenger of Allah (ﷺ) say: ‘For every mistake there are two prostrations, after saying the Salam.’”
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan
Muhammad Fouad Abd al-BaqiHasan
Zubair Ali ZaiHasan
In-book reference: 5:417