Sayyiduna Abu Sa'id (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) "permitted kissing and cupping for the fasting person."
Ali (al-Daraqutni) said: All of them are thiqat (trustworthy), and others besides Mu'tamir narrate it mawquf (as the Companion's own words). It has also been narrated marfu' from Abu al-Mutawakkil through another route.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الصيام / 8268