What did the Prophet Muhammad (saw) explain about performing ablution and praying?
      Narrated Humran:                          (the slave of 'Uthman) I saw 'Uthman bin 'Affan asking for a tumbler      of water (and when it was brought) he poured water over his hands and      washed them thrice and then put his right hand in the water container      and rinsed his mouth, washed his nose by putting water in it and then      blowing it out. then he washed his face and forearms up to the      elbows thrice, passed his wet hands over his head and washed his feet      up to the ankles thrice. Then he said, "Allah's Apostle said 'If      anyone performs ablution like that of mine and offers a two-rak'at      prayer during which he does not think of anything else (not related to     the present prayer) then his past sins will be forgiven.' "