(34) باب الصَّائِمِ يَبْلَعُ الرِّيقَ
Narrated Aisha, Ummul Mu'minin:
The Prophet (ﷺ) used to kiss her and suck her tongue when he was fasting.
Reference: Sunan Abi Dawud 2386
In-book reference: Book 14, Hadith 74
English translation: Book 13, Hadith 2380