You have reproached me ten times. You aren’t ashamed that you attack me.
Job's friends had passed a very severe censure upon him as a wicked man because he was so grievously afflicted; now here he tells them how ill he took it to be so censured. Bildad had twice begun with a How long (Job 8:2, Job 18:2), and therefore Job, being now to answer him particularly, begins with a How long too, Job 19:2.
Commenting on Job 19:1-7
These ten times have ye reproached me: ye are not ashamed [that] ye make yourselves strange to me. (a) That is, many times, as in .
These--prefixed emphatically to numbers (Gen 27:36). ten--that is, often (Gen 31:7). make yourselves strange--rather, "stun me" [GESENIUS]. (See Margin for a different meaning [that is, "harden yourselves against me"]).