Formed like mar'ashah; properly, a headpiece, i.e. (plural for adverbial) at (or as) the head-rest (or pillow) -- bolster, head, pillow. Compare marglah.
KJV: And he lighted upon a certain place, and tarried there all night, because the sun was set; and he took of the stones of that place, and put them for his pillows, and lay down in that place to sleep.
NASB: He came to a certain place and spent the night there, because the sun had set; and he took one of the stones of the place and put it under his head, and lay down in that place.
KJV: And Jacob rose up early in the morning, and took the stone that he had put for his pillows, and set it up for a pillar, and poured oil upon the top of it.
NASB: So Jacob rose early in the morning, and took the stone that he had put under his head and set it up as a pillar and poured oil on its top.
KJV: So David and Abishai came to the people by night: and, behold, Saul lay sleeping within the trench, and his spear stuck in the ground at his bolster: but Abner and the people lay round about him.
NASB: So David and Abishai came to the people by night, and behold, Saul lay sleeping inside the circle of the camp with his spear stuck in the ground at his head; and Abner and the people were lying around him.