ūnavimśe — mathurā haite prayāga-gamana
tāra madhye śrī-rūpere śakti-sañcāraṇa
ūnavimśe - in the Nineteenth Chapter; mathurā haite - from Mathurā; prayāga-gamana - going to Prayāga; tāra madhye - within that; śrī-rūpere - Śrī Rūpa Gosvāmī; śakti-sañcāraṇa - empowering to spread devotional service.