[Pooya/Ali Commentary 11:73] (see commentary for verse 69) Aqa Mahdi Puya says: Sarah was included in the Ahl ul Bayt because firstly she was a cousin of Ibrahim and secondly she was going to give birth to Is-haq, in addition to her own merits, otherwise a wife (particularly one who does not possess required merits) cannot be included into the Ahl ul Bayt, a divinly chosen term to praise and glorify certain persons, because a wife can be divorced, after which she ceases to be a member of the house. Some of the Holy Prophet's wives had been censured by the Quran for their unbecoming conduct. The event of mubahila (Ali Imran: 61) has confirmed that the wives of the Holy Prophet were not chosen as nisa-ana, because none of them were among the Ahl ul Bayt. The term Ahl ul Bayt has been used exclusively for the family of Ibrahim, including both the Israelite and the Ismailite branches. As the chosen party of Allah, since time immemorial, they strived to establish "houses of prayer and worship" to serve Allah, and kept these houses purified, because they themselves had been thoroughly purified by Allah.