How do we know that infants who die are with God?

In 2 Samuel 12, after the death of his infant son, David states, 'I shall go to him, but he shall not return to me.' This indicates David's assurance that his child was with the Lord, underscoring the belief that God holds infants in a special grace and they are indeed welcomed into His presence. This perspective is vital in understanding the heart of God towards those too young to understand sin or make a profession of faith, reflecting His justice and mercy. Therefore, from a sovereign grace viewpoint, we trust in God's character to save those unable to choose Him.