What do we know about the Prophet Muhammad's (saw) practice of praying Duha?
 Narrated 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."