'Dedicate' in the Bible

She made a vow saying, "O Lord of hosts, if you will look with compassion on the suffering of your female servant, remembering me and not forgetting your servant, and give a male child to your servant, then I will dedicate him to the Lord all the days of his life. His hair will never be cut."

Now I dedicate him to the Lord. From this time on he is dedicated to the Lord." Then they worshiped the Lord there.

Samuel told them, “If you are returning to the Lord with all your heart, get rid of the foreign gods and the Ashtoreths that are among you, dedicate yourselves to the Lord, and worship only Him. Then He will rescue you from the hand of the Philistines.”