Job 4:3 KJV

Behold, thou hast instructed many, and thou hast strengthened the weak hands.
Job 4:3, King James Version

In context

2 If we assay to commune with thee, wilt thou be grieved? but who can withhold himself from speaking?

3 Behold, thou hast instructed many, and thou hast strengthened the weak hands.

4 Thy words have upholden him that was falling, and thou hast strengthened the feeble knees.