en_tn_condensed/1sa/19/13.md

she put a pillow of goats' hair at its head, and covered it with the clothes

Possible meanings are 1) the head of the idol was lying on the goat's hair pillow and Michal dressed the idol in David's clothes or 2) Michal used David's clothes as a blanket and made the "pillow" of goat's hair look like David's hair.