ei-mata - in this way; gopālera - of the Gopāla Deity; karuṇa svabhāva - kind behavior; yei - which; bhakta janera - of persons who are devotees; dekhite - to see; haya - there is; bhāva - ecstatic love.

This is the way of Lord Gopāla’s kind behavior to His devotees. Seeing this, the devotees were overwhelmed by ecstatic love.