According to Jeremiah, Gedaliah told the people not to be afraid to work for the Chaldeans, who were their new rulers. He promised that if they stayed in the land and helped the king of Babylon, everything would go well for them.
Jeremiah 40:9: And Gedaliah the son of Ahikam the son of Shaphan sware unto them and to their men, saying, Fear not to serve the Chaldeans: dwell in the land, and serve the king of Babylon, and it shall be well with you.
While Jeremiah 40:9 promotes trust in the ruling authority’s intentions, Job 13:15 expresses a determination to trust in God even if He slays the speaker, highlighting a difference in where trust is placed.
Job 13:15: Though he slay me, yet will I trust in him: but I will maintain mine own ways before him. [maintain: Heb. prove, or, argue]