In Psalm 23, what two things comfort the psalmist in the dark valley?

Answer: God's rod and staff

"Even though I walk through the valley of the shadow of death, I will fear no evil… Your rod and Your staff, they comfort me."

“Even though I walk through the valley of the shadow of death, I will fear no evil, for You are with me; Your rod and Your staff, they comfort me.”— Psalm 23:4 (BSB)