How do we know that God delivers His people in righteousness?

In Psalm 31, deliverance in righteousness is highlighted, especially in the context of Jesus Christ's suffering and sacrifice. It is a righteous act for God to deliver His Son, and by extension, His people, through the payment for sin made by Christ. As it is stated, God delivered Christ for our transgressions and justified Him through His resurrection, affirming that all His works are rooted in righteousness. This meaning underscores the assurance that everyone for whom Christ died will ultimately receive salvation and eternal life, proving God's justice in the act of redemption.