The writer continues to use parallelism in the first two verses, conveying a single idea using two different statements to emphasize Job's intense suffering. (See: [[rc://en/ta/man/translate/figs-parallelism]])
Here "bed" and "couch" are metonyms for "sleep." In lying down to sleep, Job would hope to be comforted. The metonyms also have human attributes; they have the ability to comfort and ease a person. Alternate translation: "My bed, my couch, will be like someone who can comfort me" (See: [[rc://en/ta/man/translate/figs-metonymy]] and [[rc://en/ta/man/translate/figs-personification]])