In Job 13:15, what does Job say he will still do even if God slays him?

Answer: Hope in Him

Job 13:15: "Though He slay me, I will hope in Him" (KJV: "yet will I trust in him"). He adds that he will still defend his ways.

“Though He slay me, I will hope in Him. I will still defend my ways to His face.”— Job 13:15 (BSB)