Bindeth up, to wit, the wounds, as good surgeons use to do when they have dressed them, in order to their healing. Compare Psalms 147:3 Ezekiel 34:4. The sense is, Though he hath seen it fit to wound thee, yet he will not always grieve thee, but will in due time release thee from all thy miseries. Therefore despair not.
Related Commentaries of Job 5:18
Job 5:18
18 For he maketh sore, and bindeth up: he woundeth, and his hands make whole.