Head-rest; pillow. Source: A King James Dictionary. (Used with permission. Copyright © Philip P. Kapusta)
And when the messengers were come in, behold, there was an image in the bed, with a pillow of goats' hair for his BOLSTER. ( 1 Samuel 1:1 Exodus 26:12 )
Bibliography Information"Entry for 'Bolster'". A King James Dictionary.