When I lie down, to get some rest and sleep. The night, Heb. the evening; the part put for the whole, as it is Genesis 1:5. To and fro; from side to side in the bed, as men in grievous pains of body or anxiety of mind use to be. Unto the dawning of the day; so this Hebrew word is used also @1 Samuel 30:17; Psalms 119:147.
Related Commentaries of Job 7:4
Job 7:4
4 When I lie down, I say, When shall I arise, and the nighta be gone? and I am full of tossings to and fro unto the dawning of the day.