Abu Dawud Book 36, Hadith Number 5205.
Chapter : Not known.
Narated By Usayd ibn Hudayr, : AbdurRahman ibn AbuLayla, quoting Usayd ibn Hudayr, a man of the Ansar, said that while he was given to jesting and was talking to the people and making them laugh, the Prophet (PBUH) poked him under the ribs with a stick. He said: Let me take retaliation. He said: Take retaliation. He said: You are wearing a shirt but I am not. The Prophet (PBUH) then raised his shirt and the man embraced him and began to kiss his side. Then he said: This is what I wanted, Apostle of Allah!