The HIERONIMO Dictionary
Definition:
Be quiet ("attention signal", Crystal and Crystal 2008)
"Enough, forbear" (Jenkins, HAMLET, p. 407)
Category:
Discourse marker - Speaker
Who speaks: Hamlet.
To whom: Horatio.
Observation:
"let be" is only present in the Second Quarto.
"Enough, forbear" (Jenkins, p. 407)