It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) concerning the saying of Allah, "unless they commit a clear immorality" [Al-Talaq: 1] , that he said: "(A woman's) leaving her house (without need, during the waiting period) is 'fahishah mubayyinah' (clear disobedience)." This hadith is sahih (authentic) on the condition of Imam Muslim, but the two Shaykhs (Bukhari and Muslim) did not record it.