Prayer (Kitab Al-Salat)

Dawud :: Book 2 : Hadith 689

Narrated AbuHurayrah:

The Prophet (peace_be_upon_him) said: When one of you prays, he should put something in front of his face, and if he can find nothing , he should set up his staff; but if he has no staff, he should draw a line; then what passes in front of him will not harm him.