Behest
Behest ({not transcribed}) , noun
[Old English biheste promise, command, Anglo-Saxon behas promise; pref. be- + has command. See Hest, Hight.]
1.
That which is willed or ordered; a command; a mandate; an injunction.
To do his master's high behest.
2.
A vow; a promise. [Obsolete]
The time is come that I should send it her, if I keep the behest that I have made.
Behest , transitive verb
To vow. [Obsolete] — Paston