1 Samuel 1:20-23

and in due time she gave birth to a son. She named him Samuel, for she said, “I asked the LORD for him.” The next year Elkanah and his family went on their annual trip to offer a sacrifice to the LORD and to keep his vow. But Hannah did not go. She told her husband, “Wait until the boy is weaned. Then I will take him to the Tabernacle and leave him there with the LORD permanently.” “Whatever you think is best,” Elkanah agreed. “Stay here for now, and may the LORD help you keep your promise.” So she stayed home and nursed the boy until he was weaned.