Jami` at-Tirmidhi 572

جامع الترمذي#572Sahih

Anas bin Malik narrated that :the Messenger of Allah said: "To spit in the Masjid is a sin, and burying it is its atonement

Scholarly Authentication

We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:

Ahmad Muhammad ShakirSahih

Al-AlbaniSahih

Bashar Awad MaaroufHasan Sahih

Zubair Ali ZaiSahih - Agreed Upon

In-book reference: 6:29