The origin of acts of worship is based on the restriction. They should not be added to or subtracted from. The one who is in a state of ihram for Hajj is like the one who is in a state of ihram for prayer, so he should not do anything in them except what he has prescribed to do in it. Among the actions in acts of worship are those that are permissible for him to do or omit, and some of them are those that are desirable to do in them. Among them are actions that discredit their perfection, and among them are actions that invalidate them, even if they are an act of worship, such as one who is obligated to speak while he is praying. If he speaks that, the prayer is invalidated, or he does an act that he must do, which invalidates the prayer. There is no disagreement among the scholars that if he circumambulates, it does not affect his Hajj in any form of corruption or invalidity.