What did the Prophet Muhammad (saw) say about praying one rak'a of the `Asr and Fajr prayers?
 Narrated Abu Huraira:                     Allah's Apostle said, "If anyone of you can get one rak`a of the `Asr prayer before sunset, he should complete his prayer. If any of you can get one rak`a of the Fajr prayer before sunrise, he should complete his prayer."