They made their hearts like flint and would not listen to the law or to the words that the LORD of Hosts had sent by His Spirit through the earlier prophets. Therefore great anger came from the LORD of Hosts.
Jewish Publication Society of America Version (JPS1917) - Zechariah 7:12 >Yea, they made their hearts as an adamant stone, lest they should hear the law, and the words which the LORD of hosts had sent by His spirit by the hand of the former prophets; therefore came there great wrath from the LORD of hosts.