When Rāhula became eighteen years old, the Buddha instructed Rāhula in a meditation technique to counter the desires that hinder him during his tours for alms. Rāhula had grown enamored with his own and his father's handsome appearance. To help Rāhula, the Buddha taught another discourse to him. He told Rāhula that all matter is not-self, and the same held for the different parts of one's mental experience. Having heard the discourse, Rāhula started to practice meditation. His teacher Śāriputra recommended him to practice breathing meditation, but was unable to give Rāhula the instructions he needed. Rāhula therefore asked the Buddha to explain the meditation method in more detail and the Buddha responded by describing several meditation techniques to him. On a similar note, the Buddha taught Rāhula at a place called Andhavana about the impermanence of all things, and instructed him how to overcome the "taints" inside the mind. As a result, Rāhula attained enlightenment. Pāli tradition has it that the sermon was also attended by a crore of heavenly beings, who once had vowed to witness the enlightenment of the son of the Buddha. Rāhula obtained the name "Rāhula the Lucky" (; ), which he himself explained was because of being the son of the Buddha, and because of having attained enlightenment.