Gopalacampu 1.16.38

1.16.38

[22] asya cābhidheyam idam,
tāsāṃ kṛṣṇāvaloke pramada-samuditir na svarūpeṇa vaktuṃ
śakyā kintu sva-kārya-sphuraṇa-padatayā kiñcid uddeśam āptā |
tad-viśleṣe yathāsāṃ yuga-śataka-daśāṃ yāti kālaḥ kalākhyas
tadvat tasyānuṣaṅge yuga-śatam api tad bhāti śaśvat kalābham || [sragdharā]

And the import of this is:
The arising of joy in those maidens at the sight of Kṛṣṇa cannot be described in its true nature,
yet it has received some indication by serving as the ground for the manifestation of its effects:
just as in separation from him a fragment of time called a kalā undergoes the state of a hundred cosmic ages,
even so, in his company, even a hundred cosmic ages constantly appears like a kalā.