Sunan Ibn Majah 1715
سنن ابن ماجه#1715SahihIt was narrated from Thawban, the freed slave of the Messenger of Allah (ﷺ), that the Messenger of Allah (ﷺ) said:“Whoever fasts six days after the Fitr will have completed the year, for whoever does a good deed will have the reward of ten like it.”
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: 7:78