(51) باب الْمَضْمَضَةِ بَعْدَ الطَّعَامِ
Narrated Suwaid bin An Nu`man:
We went out with Allah's Messenger (ﷺ) to Khaibar, and when we reached As-Sahba', the Prophet (ﷺ) asked for food, and he was offered nothing but Sawiq. We ate, and then Allah's Messenger (ﷺ) stood up for the prayer. He rinsed his mouth with water, and we too, rinsed our mouths.
Reference: Sahih al-Bukhari 5454
In-book reference: Book 70, Hadith 83
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 1, Book 65, Hadith 365