rātri-dina - day and night; kuñje - in the gardens or bushes of Vṛndāvana; krīḍā - pastimes; kare - performs; rādhā-saṅge - with Rādhārāṇī; kaiśora - the pre-youthful; vayasa - age; sa-phala - fruitful; kaila - made; krīḍā-raṅge - taking pleasure in different pastimes.

“Day and night Lord Śrī Kṛṣṇa enjoys the company of Śrīmatī Rādhārāṇī in the bushes of Vṛndāvana. Thus His pre-youthful age is fulfilled through His affairs with Śrīmatī Rādhārāṇī.