Ezekiel 39:1
"Therefore, thou son of man, prophesy against Gog, and say, Thus saith the Lord GOD; Behold, I am against thee, O Gog, the chief prince of Meshech and Tubal:"
Cross References (ranked by relevance)
Ezekiel 35:3
And say unto it, Thus saith the Lord GOD; Behold, O mount Seir, I am against thee, and I will stretch out mine hand against thee, and I will make thee most desolate.
Nahum 3:5
Behold, I am against thee, saith the LORD of hosts; and I will discover thy skirts upon thy face, and I will shew the nations thy nakedness, and the kingdoms thy shame.
Nahum 2:13
Behold, I am against thee, saith the LORD of hosts, and I will burn her chariots in the smoke, and the sword shall devour thy young lions: and I will cut off thy prey from the earth, and the voice of thy messengers shall no more be heard.