Discovery BoxZechariah 7:12 
Context7:12 Indeed, they made their heart as hard as diamond, 1 so that they could not obey the Torah and the other words the Lord who rules over all had sent by his Spirit through the former prophets. Therefore, the Lord who rules over all had poured out great wrath.
Zechariah 7:14
Context7:14 ‘Rather, I will sweep them away in a storm into all the nations they are not familiar with.’ Thus the land had become desolate because of them, with no one crossing through or returning, for they had made the fruitful 2 land a waste.”
Zechariah 13:3
Context13:3 Then, if anyone prophesies in spite of this, his father and mother to whom he was born will say to him, ‘You cannot live, for you lie in the name of the Lord.’ Then his father and mother to whom he was born will run him through with a sword when he prophesies. 3
Zechariah 14:5
Context14:5 Then you will escape 4 through my mountain valley, for the mountains will extend to Azal. 5 Indeed, you will flee as you fled from the earthquake in the days of King Uzziah 6 of Judah. Then the Lord my God will come with all his holy ones with him.
1 tn The Hebrew term שָׁמִיר (shamir) means literally “hardness” and since it is said in Ezek 3:9 to be harder than flint, many scholars suggest that it refers to diamond. It is unlikely that diamond was known to ancient Israel, however, so probably a hard stone like emery or corundum is in view. The translation nevertheless uses “diamond” because in modern times it has become proverbial for its hardness. A number of English versions use “flint” here (e.g., NASB, NIV).
2 tn Or “desirable”; traditionally “pleasant” (so many English versions; cf. TEV “This good land”).
3 sn Death (in this case being run…through with a sword) was the penalty required in the OT for prophesying falsely (Deut 13:6-11; 18:20-22).
4 tc For the MT reading נַסְתֶּם (nastem, “you will escape”) the LXX presupposes נִסְתַּם (nistam, “will be stopped up”; this reading is followed by NAB). This appears to derive from a perceived need to eliminate the unexpected “you” as subject. This not only is unnecessary to Hebrew discourse (see “you” in the next clause), but it contradicts the statement in the previous verse that the mountain will be split open, not stopped up.
5 sn Azal is a place otherwise unknown.
6 sn The earthquake in the days of King Uzziah, also mentioned in Amos 1:1, is apparently the one attested to at Hazor in 760
