The answer is those who stray to themselves are of the rank of obligation and the rank of impossibility, as only one who strays can be arrested. If he had not strayed, he would not have been arrested. Seizure only occurs as a result of straying or anticipating straying, so the rule of straying is a ruling on him being arrested. In it, they were required to be arrested. Some of them were arrested at the level of obligatory arrest, and among them were those who were arrested at the level of impossible .