Musnad Ahmad 1153:121

Sufyan narrated to us, from Mansur, from Ibrahim, from Alqama: Alqama and his companions went out for Hajj. Some of them mentioned a fasting person kissing and engaging in physical intimacy. A man among them, who had stood [in prayer] for two years and fasted them, said: "I intended to take my bow and strike you with it." He said: "So they refrained until they came to Aisha." They entered upon Aisha and asked her about that. Aisha said: "The Messenger of Allah (peace and blessings of Allah be upon him) used to kiss and engage in physical intimacy, and he was the most capable of you in controlling his desire." They said: "O Abu Shibl, ask her." He said: "I will not speak obscenely in her presence today." So they asked her, and she said: "He used to kiss and engage in physical intimacy while he was fasting."