The implied information is that this is when Job would lie down to sleep at night. AT: "When I lie down to sleep" (See: [[rc://en/ta/man/translate/figs-explicit]])
# I say to myself
Job poses a question to no one else in particular. AT: "I ask" or "I wonder" (See: [[rc://en/ta/man/translate/figs-rpronouns]])
# When will I get up and when will the night be gone?
Job poses this question to emphasize his intense suffering during the hours he should be sleeping. AT: "I wish I could get up, but night continues." (See: [[rc://en/ta/man/translate/figs-rquestion]])
"turning back and forth." This indicates that Job has moved on his bed all night without any rest.
# My flesh is clothed with worms and clods of dust
The worms and clods of dust are pictured as covering Job as if they were clothing. AT: "My flesh is covered with worms and clods of dust" (See: [[rc://en/ta/man/translate/figs-metaphor]])
# My flesh
This represents his whole body. AT: "My body" (See: [[rc://en/ta/man/translate/figs-synecdoche]])