增壹阿含經 24.5.p175

24.5.p175

The Bhagavān told him, “When a Tathāgata is present in the world, he should do five things. What are the five? First is to turn the Dharma wheel. Second is to explain the teaching to his father. Third is to explain the teaching to his mother. Fourth is to lead ordinary men to establish the bodhisattva practice. Fifth is to give the prediction [of becoming a Buddha] to a bodhisattva. These, Kāśyapa, are the five things a Tathāgata appears in the world to do.”