Zechariah 6:8
Then cried he upon me, and spake unto me, saying, Behold, these that go toward the north country have quieted my spirit in the north country.
Cross-references
Isaiah 48:14
Historical context
Isaiah 48:14 explicitly declares God's purpose against Babylon, the same 'north country' where Zechariah's Spirit is set at rest.
Jeremiah 51:48
Historical context
Jeremiah 51:48 has heaven rejoicing over Babylon's fall from the north, directly relating to the north country where Zechariah's Spirit rests.
Ezekiel 5:13
Parallel
Ezekiel 5:13 describes God's anger being spent and satisfied, the same concept as Zechariah's Spirit being set at rest after judgment.
Ezekiel 16:42
Parallel
Ezekiel 16:42 says God's wrath will be satisfied and He will be calm, nearly identical to Zechariah's Spirit resting after judgment.