The Collaborative International Dictionary of English v.0.48:

Hest \Hest\ (h[e^]st), n. [AS. h[=ae]s, fr. h[=a]tan to call,
   bid. See Hight, and cf. Behest.]
   Command; precept; injunction. [Archaic] See Behest. "At thy
   hest." --Shak.
   [1913 Webster]

         Let him that yields obey the victor's hest. --Fairfax.
   [1913 Webster]

         Yet I thy hest will all perform, at full. --Tennyson.
   Hestern