Bhakti-rasāmṛta-sindhu .1.330
idam eva hareḥ prājñair nava-yauvanam ucyate ||330||
[idam eva hareh praajnair nava-yauvanam uchyate ||330||]
Blended reading (Sanskrit + English inline)
idam eva hareḥ prājñair nava-yauvanam ucyate ||330||
This last part of youth (kaiśora) is called new youth (nava-yauvana) by the wise.
Purport
Learned scholars therefore describe the features of His body at this time as nava-yauvana, newly invented youthfulness.
— A.C. Bhaktivedanta Swami Prabhupāda
My note
Source: vedabase.io