Sunan Ibn Majah 764
سنن ابن ماجه#764SahihIt was narrated from 'Aishah that:The Prophet scratched some spittle from the prayer direction of the mosque
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 ZaiIsnaad Sahih
In-book reference: 4:30