"Do not let your eyes sleep; do not let your eyelids slumber." These two phrases mean the same thing and are repeated to emphasize how important it is not to be lazy. It is also stated negatively for even more emphasis. AT: "Stay awake, and do what you can" (See: [[rc://en/ta/man/translate/figs-parallelism]] and [[rc://en/ta/man/translate/figs-litotes]])
This is a figure of speech using parts of your face to mean your whole body. AT: "yourself ... yourself" (See: [[rc://en/ta/man/translate/figs-synecdoche]])