Caitanya-caritāmṛta 19.141
bālāgra-śata-bhāgasya śatadhā kalpitasya ca bhāgo jīvaḥ sa vijñeya iti cāha parā śrutiḥ
[baalaagra-shata-bhaagasya shatadhaa kalpitasya cha bhaago jeevah sa vijneya iti chaaha paraa shrutih]
Blended reading (Sanskrit + English inline)
bālāgra-śata-bhāgasya śatadhā kalpitasya ca bhāgo jīvaḥ sa vijñeya iti cāha parā śrutiḥ
“ ‘If we divide the tip of a hair into one hundred parts and then take one part and divide this into another one hundred parts, that ten-thousandth part is the dimension of the living entity. This is the verdict of the chief Vedic mantras.’
Purport
The first three padas of this verse from the Pañcadaśī-citra-dīpa (81) are taken from the Śvetāśvatara Upaniṣad (5.9).
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io