pratāparudrera - of King Pratāparudra; eka - one; āchaye - is; niyame - a regular duty; yata dina - as long as; rahe - remained; teṅha - he; śrī-puruṣottame - at Jagannātha Purī.

As long as King Pratāparudra stayed in Puruṣottama, he performed one regular duty.