Commentary for Job 19:29

for the wrath For you are committing much iniquity that will bring about the sword.

in order that you know and understand the secret of the retribution that will come upon the wicked. Also, the mesorah is authoritative and שדין is written, as though it would say that there is justice (שיש דין) in the world, like (Jud. 5:7), “I, Deborah, arose (שַׁקַמְתִּי), [like שֶׁקַמְתִּי].” I saw this in Tanchuma (Mishpatim 3)