According to them , communal Friday prayers with a sermon were wrong .
According to them , communal Friday prayers with a sermon had lapsed ( along with several other religious practices ) until the return of their 12th Imam , Muhammad al - Mahdi .
According to them , communal Friday prayers with a sermon were wrong and had lapsed ( along with several other religious practices ) until the return of their 12th Imam , Muhammad al - Mahdi .