Adam Clarke's Commentary on the Bible - Zechariah 7:14
I scattered them with a whirlwind - This refers to the swift victories and cruel conduct of the Chaldeans towards the Jews; they came upon them like a whirlwind; they were tossed to and fro, and up and down, everywhere scattered and confounded. read more
Adam Clarke's Commentary on the Bible - Zechariah 7:12
Made their hearts as an adamant stone - שמיר shamir may mean the granite. This is the hardest stone with which the common people could be acquainted. Perhaps the corundum, of which emery is a species, may be intended. Bochart thinks it means a stone used in polishing others. The same name, in Hebrew, applies to different stones. read more