What does 1 Samuel 1:21 mean?
Hannah had made a vow to the Lord (1 Samuel 1:11). If He would grant her a son, she would give the boy back to the Lord for his entire life. The implication is that the boy would be dedicated to serve in the temple of the Lord, following the pattern of Leviticus 27:1–8.The Lord granted Hannah's request. Her vow became her husband's vow, as well (Numbers 30:10–15). It is possible Elkanah made an additional vow, too. After Samuel was born, Elkanah planned the annual trip to Shiloh to sacrifice to the Lord. He was also going to make good on his vow. This implies one of two things. He may have planned to give Samuel to the priest, Eli, at the temple then. The other option is he was planning a separate sacrifice to the Lord which he had vowed, likely in relation to Hannah having a son.