Sahih Bukhari Volume 2, Book 21, Hadith Number 271.

Narated By Muwarriq : I asked Ibn ‘Umar “Do you offer the Duha prayer?” He replied in the negative. I further asked, “Did ‘Umar use to pray it?” He (Ibn ‘Umar) replied in the negative. I again asked, “Did Abu Bakr use to pray it?” He replied in the negative. I again asked, “Did the Prophet use to pray it?” Ibn ‘Umar replied, “I don’t think he did.”