Javanese central buddhisattva 9th century

In Buddhism, a Bodhisattva; Bodhisattva (Sanskrit) or Bodhisatta (Pali) or Photishat (Thai: โพธิสัตว์) is a Buddha-to-be who is perfecting the 10 paramis / virtues before becoming a Buddha.

     In Sanskrit, the term Bodhisattva consists of two words, namely bodhi which means enlightenment or illumination, and sattwa which means creature. Bodhisattva also refers to Buddha in His previous life. In Mahayana teachings, Bodhisattvas take a vow not to enter nirvana until all beings have attained Buddhahood. This means that he postponed entering nirvana and chose to descend to earth to sacrifice himself to help other beings achieve enlightenment

     Monks, before becoming fully enlightened, while I was still an unenlightened Bodhisatta, I too, myself subject to birth, old age, illness, death, grief and defilement, sought that which is subject to birth, old age, illness, death. , sorrow and filth.

     he postponed entering nirvana and chose to descend to earth to sacrifice himself to help other beings achieve enlightenment. That's why Bodhisattvas are known to have compassion and selflessness and self-sacrifice. This is not the same as in the traditional Theravada tradition, beings who attain enlightenment are Arhats, not Buddhas.

https://id.wikipedia.org/wiki/Bodhisatwa#Bodhisatwa_pada_ajar_Theravada