Albert Barnes Commentary Luke 12:3

"Wherefore whatsoever ye have said in the darkness shall be heard in the light; and what ye have spoken in the ear in the inner chambers shall be proclaimed upon the housetops." — Luke 12:3 (ASV)

Shall be proclaimed upon the housetops. See Barnes on Matthew 20:27.

The custom of making proclamation from the tops or roofs of houses still prevails in the East. Dr. Thomson (The Land and the Book, vol. i. p. 51, 52) says:

"At the present day, local governors in country districts cause their commands thus to be published. Their proclamations are generally made in the evening, after the people have returned from their labors in the field. The public crier ascends the highest roof nearby, and lifts up his voice in a long-drawn call upon all faithful subjects to give ear and obey. He then proceeds to announce, in a set form, the will of their master, and demand obedience to it."