The Significance of Sealing Blessings with Boruch

This is also why we conclude each of the first three blessings in the ‘Birkas Hamozon’ with a Boruch. This is because the conclusion is like a seal that it should not be interfered with by an outsider. Because since the ‘Hamshocha’ through ‘Birkas Hamozon’ is drawn right down below as mentioned, there needs to be extra care that it should not be interfered with by an outsider.