Therefore, wait you the day when the sky will bring a clear smoke,
Therefore, watch for the day when the sky brings a profound smoke.
Watch for the Day when the heaven will bring clear smoke
So wait for the day when the heaven brings a clear drought
So observe/lie in wait, a day/time the sky/space comes with clear/evident smoke/fumes
Your doubt will certainly be removed, when you see the mass of smoke descending from the heaven
So you await the day when the sky will bring forth a visible smoke.
So watch thou for the day when the sky will bring forth a visible smoke
So wait for the Day when the sky will cause a clear smoke to appear
So (Prophet!) watch for the day when the sky will bring about a clear drought
Then wait you for the Day when the sky will bring forth a visible smoke