evaá¹-vrataḥ sva-priya-nÄma-kÄ«rtyÄ
jÄtÄnurÄgo druta-citta uccaiḥ
hasaty atho roditi rauti gÄyaty
unmÄda-van ná¹›tyati loka-bÄhyaḥ
evam-vrataḥ - when one thus engages in a vow to chant and dance; sva - own; priya - very dear; nÄma - holy name; kÄ«rtyÄ - by chanting; jÄta - in this way develops; anurÄgaḥ - attachment; druta-cittaḥ - very eagerly; uccaiḥ - loudly; hasati - laughs; atho - also; roditi - cries; rauti - becomes agitated; gÄyati - chants; unmÄda-vat - like a madman; ná¹›tyati - dances; loka-bÄhyaḥ - without caring for outsiders.
This is a quotation from ÅšrÄ«mad-BhÄgavatam (11.2.40).