Be it known, &c. — This is a mere fiction, which being confidently affirmed, they thought would easily find belief with a king whose heart and ears they possessed by their hired counsellors.
Related Commentaries of Ezra 4:12
Ezra 4:12
12 Be it known unto the king, that the Jews which came up from thee to us are come unto Jerusalem, building the rebellious and the bad city, and have set upf the walls thereof, and joined the foundations.