Ezekiel 4:6-8

6When you have completed these [days for Israel], lie down again, but on your right side (toward the south), and you shall bear the wickedness and punishment of the house of Judah forty days. I have assigned you one day for each year.

7Then you shall set your face toward the siege of Jerusalem with your arm bared and prophesy against it.

8Now behold, I will put ropes on you so that you cannot turn from one side to the other until you have completed the days of your siege.