Major H.G.C.S. Wayne RE described about this prayer mat in his book " Seventeen Trips through Somaliland on a visit to Abyssinia"
" The prayer-carpet generally comes from Ogaden and is a small piece of very thick tanned leather. On this the Somali makes his regular prostrations at dawn and sunset, and during the day, as becomes a devout Mussulman; when not put to this use, it is hung over the shoulder to afford protection from the chafing of the spears" pg 11
Note that Ogaden is located in Northern Somaliand and occupied by religious sheikhs.
In the book : The Mad Mullah of Somaliland by Douglas Jardine, there is a mention of an outcast tribe in Somalia especially Midgan that making a leather prayer by cutting it in the shape of the mosque of Mecca.
From FAO website, there are a few goat species in Somalia whom skins are made into prayer mat. Haraghe Highland is the small size goat that has main color of plain non spotted white and some with black and brown. The prayer mat is called Sijaja.
Another species of goat is short-eared Somali ( Denghier) which has a medium size and widely used to make sleeping mats and prayer mats. The color of the coat is mainly white 76 % with some brown, black and grey.
In a writing to CNN, The author, Dr Cawo Abdi recollected her memory of sitting on her father’s prayer mat made from goat skin somewhere in central Somalia whom they belonged to Nomadic hamlets. Her father was a Quranic teacher that teach children from hamlet to hamlet.
There is a similar mat displayed in British museum . It was acquired in 1935. Below is the link
Somali Prayer Mat In British Museum
In a video clip from Somali Museum Minnesota, the founder was shown referring to similar mats as prayer mats aged more than hundred years ( at 7:42).
Somali Museum Minnesota
My other Somalia Prayer Mats are in below link
Somali Prayer Mat #1
Somali Prayer Mat #2
Somali Prayer Mat #3
Dim : 124cm x 65cm
Date : 18th CE
Material : Goat Skin
Origin : Somalia