Srimad Bhagavatam

References to text SB 11.2.40
SB 11.2.40: By chanting the holy name of the Supreme Lord, one comes to the stage of love of Godhead. Then the devotee is fixed in his vow as an eternal servant of the Lord, and he gradually becomes very much attached to a particular name and form of the Supreme Personality of Godhead. As his heart melts with ecstatic love, he laughs very loudly or cries or shouts. Sometimes he sings and dances like a madman, for he is indifferent to public opinion.

Text â„–
One who understands perfectly the process of devotional service in love of Godhead becomes intoxicated in its discharge. Sometimes he becomes stunned in ecstasy and thus enjoys his whole self, being engaged in the service of the Supreme Self.
Narada Bhakti Sutra
NBS 6