Bhagavatapurana 6.16.32

6.16.32

sa uttamaślokapadābjaviṣṭaraṃ premāśruleśairupamehayan muhuḥ /
premoparuddhākhilavarṇanirgamo naivāśakat taṃ prasamīḍituṃ ciram //

32. Moistening often with his tears of love the foot-stool under the feet of the Supreme Person, his power of distinct utterance of all the syllables being chocked by his overpowering love, he was not for a long time able to offer his praises.