'Al-Abtah' is the name of a place which is also called the Muhassab valley. Lexically 'Al-Abtah' means a sloping ground. Since it was the passage of rainy water owing to its downward slope, it came to be known by this name. Here the Prophet (PBUH) encamped in a tent.
This Hadith provides for wearing red-coloured clothes as mentioned in detail in the preceding Hadith. Second, it points out an issue concerning the ritual prayer. The worshipper should place something before him as a symbol of obstruction (Sutra) so that somebody who goes past him may not divert his attention. Yet, there is no harm if the passer is an animal.