Jami` at-Tirmidhi 3164
جامع الترمذي#3164Da'ifNarrated Abu Sa'eed:that the Prophet (ﷺ) said: "Woe is the valley of Jahannam, the disbeliever shall drop into it for forty autumns before he reaches its bottom
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirDaif
Al-AlbaniDaif
Zubair Ali ZaiDaif
In-book reference: 47:216