I Samuel 1:21-23

Now the man Elkanah and all his house went up to offer to the LORD the yearly sacrifice and his vow. But Hannah did not go up, for she said to her husband, “Not until the child is weaned; then I will take him, that he may appear before the LORD and remain there forever.” So Elkanah her husband said to her, “Do what seems best to you; wait until you have weaned him. Only let the LORD establish His word.” Then the woman stayed and nursed her son until she had weaned him.