How do we know that God's justice prevails?

In 1 Samuel 26, David displays profound faith in God's justice when he refrains from harming Saul. He declares, 'The Lord shall smite him, or his day shall come to die, or he shall descend into battle and perish.' This reliance on God's timing illustrates a central tenet of sovereign grace theology: God is the sovereign ruler who oversees all events and will enact justice when it aligns with His divine plan. Christians are called to trust in God's perfect judgment rather than taking matters into their own hands, resting assured that He is always faithful to fulfill His promises.