prathame - in the first instance; karila - did; prabhu - Śrī Caitanya Mahāprabhu; mandira prakṣālana - washing of the temple; ūrdhva - on the ceiling; adhaḥ - on the floor; bhitti - walls; gṛha-madhya - within the home; siṁhāsana - the sitting place of the Lord.

In this way, Śrī Caitanya Mahāprabhu first washed the main temple and then thoroughly washed the ceiling, the walls, the floor, the sitting place [siṁhāsana] and everything else within the room.