Vaishnava Samhita. Gopinatha Charitam. Vol II Book VI Chp 6 Shloka 26

अव्याजकृपया ह्मेवमाचार्येणापि लालितः  |
विभिन्नह्रदयो दीनः सुस्वरं प्ररुरोद सः  ||

Thus when the guru showered causeless kindness on him he became heart-broken and started crying bitterly.