Sandipani

Sandipani (Sanskrit: सान्दीपनि, romanized: Sāndīpani), sometimes rendered Sāndīpana, is the guru of Krishna and Balarama in Hinduism.

Upon the rapid completion of their studies, they persuaded their teacher to ask for the preceptor’s dakṣiṇā (a type of honorarium to one's guru) of his own choosing.

[2] In the Harivamsha Purana, Krishna learnt that Sandipani's son has been swallowed by an asura called Panchajana, and had perished.

By the power of Krishna of peerless energy Sandipani’s son, dead long ago, returned in his bodily form.

Taking his preceptor’s son, Pancajanya and diverse precious jewels, Madhava, the Lord of the universe, returned.Main extract of the Bhagavata Purana related to Sandipani