Musannaf Ibn Abi Shayba 23:218

Ibn ‘Ulayyah narrated to us, from Ayyub, who said: A man asked Muhammad, saying: "I saw as if I were eating *khabis* (a sweet dish) in the prayer. Is *khabis* lawful?" He said: "It is lawful, but it is not lawful for you to eat in the prayer." He then said to him: "Do you kiss your wife while you are fasting?" He said: "Yes." He said: "Then do not do it."