Most people including Armenians are surprised when I tell them Armenians used Prayer rugs. Not in the way Muslims use them, but Armenians used them just the same in Church to kneel on and pray towards the Alter. The cavernous medieval churches were cold in winter. Originally there were no pews so people sat or knelt on rugs to keep warm. Also, rugs were used as curtains to cover or separate the Ciborium from the public

Please note, the word WORSHIP in Armenian language is ԵՐԿՐՊԱԳԵԼ, which translates to TO KISS THE EARTH... meaning the act of worship is exactly matching with the meaning of the word, that is to prostrate and kiss the earth. As far as I know, there is no another language where the word WORSHIP transmits the precise act of worship in the word as the Armenian language. Somehow Armenians lost this tradition over the years. Perhaps when pews were introduced.

Regarding the hands on the rug, for Armenians, the Hand (Khamsa) represents the “Hand of God” as depicted in Armenian Illuminated manuscripts such as “The Baptism of Jesus by John the Baptist”.
2'11'' x 5'5'' (89 x 165 cm)