The scholars differed regarding the middle and last session. They said regarding the middle session that it is a Sunnah and not an obligation. Some people said that it is an obligation. The principle that is relied upon in all the actions of prayer is that his actions, may God bless him and grant him peace, are not considered obligatory until evidence indicates that. As for the last session, it is the opposite of the middle session and the majority. It is an obligation and some people said that it is not an obligation. And whoever says that two sitting sessions are a Sunnah is the weakest of the opinions. Sitting during Witr prayer remains to be mentioned after this, God willing, in its chapter .