As far as I know this refers to Brihadaranyaka Upanishad 2.5.
Regards 
Victor van Bijlert 


Op 31 mei 2019 13:24 schreef Harsha Dehejia via INDOLOGY <indology@list.indology.info>:
Friends:

The Vedas mention knowledge as madhu vidya.
Does anyone have a reference to this?

Kind regards,

Prof. Harsha V. Dehejia
College of the Humanities, Carleton University
Ottawa, ON., Canada.