A great supplication
O God, O Beneficent, O Merciful, O turner of Hearts, make my heart steadfast in your religion!
This is a great supplication and we have been ordered to recite it during the period of occultation: “Yā Allah, Yā Rahmān, Yā Rahīm, Yā Muqallib al-Qulūb, Thabbit Qalbī ‘alā dīnik.” (O God, O Beneficent, O Merciful, O turner of Hearts, make my heart steadfast in your religion!)
...