Albert Barnes Commentary 1 Kings 19:6

"And he looked, and, behold, there was at his head a cake baken on the coals, and a cruse of water. And he did eat and drink, and laid him down again." — 1 Kings 19:6 (ASV)

A cake baked on the coals - This does not imply that Elijah found a fire lit with the cake on it, but only that he found one of the usual baked cakes of the desert, which is the ordinary food of the Arab today.

At his head - The Hebrew word simply means “the place on which the head lies”; therefore, the rendering in the margin is “bolster.”