Kṣitigarbha Bodhisattva Pūrvapraṇidhāna Sūtra

The Kṣitigarbha Bodhisattva Pūrvapraṇidhāna Sūtra (Sanskrit, Sutra of the Fundamental Vows of the Bodhisattva Kṣitigarbha; Chinese: 地藏菩薩本願經) or Kṣitigarbhasūtra is a Mahāyāna sūtra teaching about the Bodhisattva Kṣitigarbha and is one of the more popular sūtras in Chinese Buddhism. The sutra tells of how Kṣitigarbha became a Bodhisattva by making great vows to rescue other sentient beings and a description of how he displayed filial piety in his past lifetimes.

Source: Wikipedia — Kṣitigarbha Bodhisattva Pūrvapraṇidhāna Sūtra (CC BY-SA 4.0)