Sunan an-Nasa'i 309
سنن النسائي#309SahihIt was narrated from Abu Hurairah that the Prophet (ﷺ) said:"When any one of you prays, let him not spit in front of him or to his right, rather let him spit to his left or beneath his feet." Then the Prophet (ﷺ) spat like this on his garment and rubbed it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Abu GhuddahSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih Muslim
In-book reference: 1:310