Zechariah 1:12

12The angel of the Lord then asked, “Lord who rules over all,
Note that here the angel of the Lord is clearly distinct from the Lord who rules over all himself.
how long before you have compassion on Jerusalem and the other cities of Judah which you have been so angry with for these seventy years?”
The seventy years refers to the predicted period of Babylonian exile, a period with flexible beginning and ending points depending on the particular circumstances in view (cf. Jer 25:1; 28:1; 29:10; Dan 9:2). Here the end of the seventy years appears to be marked by the completion of the temple in 516 b.c., exactly seventy years after its destruction in 586.
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