What does the Bible say about God's justice and mercy?

In Zechariah 13:7-9, we see a profound interaction between God's justice and His mercy. The Lord commands the sword of justice to smite His shepherd, which symbolizes the sacrificial act of Christ, taking on the punishment for sin. When justice strikes the shepherd, it results in the scattering of the sheep, illustrating the depth of human sinfulness and the consequences of rebellion against God. Yet, in His mercy, God declares that He will turn His hand toward the little ones, promising to gather and restore them. This demonstrates that while God is just, He also extends His grace to those who belong to Him, ensuring that His elect are ultimately saved and sanctified despite their sins.