1 Samuel 19:16

And when the messengers were come in
To David's house, and into the room where he was supposed to lie:

behold, [there was] an image in the bed to their great surprise;
they expected to see David, but instead of him the teraphim, as in ( 1 Samuel 19:13 ) ; if they had been in the room before, and thought they had seen David in the bed, they might be the more surprised to find that it was only an image they saw:

with a pillow of goats' [hair] for his bolster;
(See Gill on 1 Samuel 19:13).