Sunan Abi Dawud 475
سنن أبي داود#475SahihAnas reported:The Messenger of Allah (ﷺ) said: Spitting in the mosque is a sin and it is expiated by burying the spittle
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Muhyi Al-Din Abdul HamidSahih
Shuaib Al ArnautSahih
Zubair Ali ZaiSahih Muslim (552)
In-book reference: 2:85