The Temple of the Lord

Hannah makes a vow to the Lord saying, you know, if you will do this, then I will. So verse 11 says she made a vow and said, a Lord of hosts,. If you will indeed look on the affliction of your maidservant and remember me... She's basically asking God for a child with the very, the promise that this child that he has gifted her will then be gifted directly back back to him for service - not just service, but also to be a Nazarite.