The Biblical basis of a child dedication is found in 1 Samuel 1:27–28, where a godly woman named Hannah prayed year after year for God to give her a child. He answered her prayer and she gave birth to a son, whom she named Samuel. When Samuel was born, Hannah prayed these words:
“For this child I prayed, and the Lord has given me my petition which I asked of Him. So I have also dedicated him to the Lord; as long as he lives he is dedicated to the Lord.”
In Luke chapter 2 of the New Testament, following the birth of Jesus, Mary and Joseph took the infant Jesus to the temple and dedicated Him. In both Scripture passages, the parents entrusted their child completely to God.
Baby dedication is not a sacrament; nor does it impart grace or salvation to a child. Salvation comes only through faith in Jesus Christ as each person recognizes their sinfulness and receives forgiveness and eternal life through Christ.