The Prophet ﷺ spat into his garment and then rubbed it in.
حدثنا عبد الصمد حدثنا حماد عن ثابت عن أبي نضرة
أن النبي ﷺ بزق في ثوبه ثم دلكه
No references are available.
Its chain of transmission is sahih. Abdul-Samad is Ibn Abdul-Warith, Hammad is Ibn Zayd, Thabit is Banani, and Abu Nadra is Abdi.The hadith was narrated by Bukhari 1/353, no. 241 Fath, in the book of wudu, spitting on clothing, and by Abu Dawud 1/106, no. 389 in the book of purification, in similar wording, and by Nasai 1/163, no. 309, and by Ibn Majah 1/327, no. 1024.