An Important Rule Often Neglected 21

Islamic Laws : Congregational prayers » Rules of congregational prayers
Fatawa of Ayatullah al Uzama Syed Ali al-Husaini Seestani


1476. The follower should not say Takbiratul ehram before the Imam.
As an obligatory precaution, he should not say the takbir until the takbir of the Imam is completed.