Ezekiel 4:6-8

6When 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. 7You must turn your face toward the siege of Jerusalem with your arm bared, and prophesy against it.

8Now behold, I will tie you up with ropes so you cannot turn from side to side until you have finished the days of your siege.