Caitanya-caritāmṛta 13.28
paugaṇḍa-vayase paḍena, paḍāna śiṣyagaṇe sarvatra karena kṛṣṇa-nāmera vyākhyāne
[pauganda-vayase padena, padaana shishyagane sarvatra karena krishna-naamera vyaakhyaane]
Blended reading (Sanskrit + English inline)
paugaṇḍa-vayase paḍena, paḍāna śiṣyagaṇe sarvatra karena kṛṣṇa-nāmera vyākhyāne
During His paugaṇḍa age He became a serious student and also taught disciples. In this way He used to explain the holy name of Kṛṣṇa everywhere.
My note
Source: vedabase.io