King James Version
Therefore, son of man, prophesy and say unto Gog, Thus saith the Lord GOD; In that day when my people of Israel dwelleth safely, shalt thou not know it?English Standard Version
"Therefore, son of man, prophesy, and say to Gog, Thus says the Lord GOD: On that day when my people Israel are dwelling securely, will you not know it?New International Version
"Therefore, son of man, prophesy and say to Gog: 'This is what the Sovereign LORD says: In that day, when my people Israel are living in safety, will you not take notice of it?