CC Madhya 8.167
tāruṇyāmṛta-dhārāya snāna madhyama
Śrīmatī Rādhārāṇī first smears Her body with the paste of Kṛṣṇa’s affection for Her. She then takes Her bath in the water of mercy. After passing the paugaṇḍa age (from five to ten years), Śrīmatī Rādhārāṇī first appears as mercy. The second bath is taken at noon in the water of tāruṇyāmṛta, or the nectar of youth. This is the actual expression of Her new youthfulness.