What final advice did the Buddha give his disciples before passing into nirvana?

Before passing into nirvana, the Buddha provided several final instructions to his disciples at Kusinara.

He advised that after his passing, the dharma and the vinaya (the code of monastic conduct) should serve as the teacher for the community. He also offered his disciples a final opportunity to voice any remaining questions or doubts; when they remained silent, he affirmed that they were all destined to achieve liberation.

His final exhortation to the monks was a reminder of the doctrine of impermanence: he declared that all conditioned things are transient and urged them to strive with diligence. Following these words, he entered into deep meditative absorption and passed into nirvana.1