E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
Cutting the beard. The Turks think it a dire disgrace to have the beard cut. Slaves who serve in the seraglio have clean chins, as a sign of their servitude.
Kissing the beard. In Turkey wives kiss their husband, and children their father on the beard.
To make ones beard (Chaucer). This is the French Faire la barbe à quelquun, and refers to a barbers taking hold of a mans beard to dress it, or to his shaving the chin of a customer. To make ones beard is to have him wholly at your mercy.
I told him to his beard. I told him to his face, regardless of consequences; to speak openly and fearlessly.