On a classical limit of q-deformed Whittaker functions

We provide a derivation of the Givental integral representation of the classical $g{l}_{\mathrm{\ell }+1}$-Whittaker function as a limit $q\to 1$ of the q-deformed $g{l}_{\mathrm{\ell }+1}$-Whittaker function represented as a sum over the Gelfand-Zetlin patterns.