We can promise to change our lives in return for a request we ask from God, but should we do this? Although not forbidden, making vows is a risky business.
Hannah gave up the very thing she asked for. Her willingness to give God her most precious possession stands on par with Abraham's renowned sacrifice of Isaac.
Envy is a work of the flesh, involving coveting. A significant example of envy is found in the relationship of the two wives of Elkanah, Hannah and Peninnah.