Abu Dawud Book 7, Hadith Number 2330.

Narated By AbuHurayrah : AbdulAziz ibn Muhammad said: Abbad ibn Kathir came to Medina and went to the assembly of al-Ala’. He caught hold of his hand and made him stand and said: O Allah, he narrates a tradition from his father on the authority of AbuHurayrah who reported the Apostle of Allah (PBUH) as saying: When the middle of Sha’ban comes, do not fast. Al-Ala’ said: O Allah, my father narrated this tradition on the authority of AbuHurayrah from the Prophet (PBUH)