Divorce (Kitab Al-Talaq)
Dawud :: Book 12 : Hadith 2194
Narrated Abdullah ibn Abbas:
Tawus said: AbusSahba' said to Ibn Abbas: Do you know that a divorce by three pronouncements was made a single one during the time of the Prophet (peace_be_upon_him), and of AbuBakr and in the early days of the caliphate of Umar? He replied: Yes.