Sahih Bukhari Volume 5, Book 59, Hadith Number 571.

Narrated By Yazid bin Abi Ubaid : Salama bin Al-Akwa’ said, “I fought in seven Ghazwat along with the Prophet.” He then mentioned Khaibar, Al-Hudaibiya, the day (i.e. battle) of Hunain and the day of Al-Qurad. I forgot the names of the other Ghazwat.