"New mat / bed"

Dear All,

This is not specifically Pali in content, but I wonder if anybody could
help.  I am working on a text, originally Sanskrit  (earlier Prakrit), but
now sadly only available in Chinese and Tibetan.  On at least three
occasions it refers to a monk sitting upon a "new mat / bed" -- often when
speaking of persons supposedly advanced in abilities.  Could this have any
particular significance -- if not I am wondering if it could be a faulty
Sanskritization for something else.  I would be glad to read any ideas about
this.

Best wishes,
Stephen Hodge