Ezekiel 4:6

When you have completed these days, lie down again, but on your right side, and bear the iniquity of the house of Judah. I have assigned to you 40 days, a day for each year.

And when thou hast accomplished them, lie again on thy right side, and thou shalt bear the iniquity of the house of Judah forty days: I have appointed thee each day for a year.