The Buddha exhorts the monks at Jetavana to strive earnestly to be heirs, not of the world's goods, but of the Doctrine. On the Buddha's departure the monks gather round Sáriputta and ask him how the Buddha expects them to cultivate the inner life with the same aloofness as does the Buddha himself, and Sáriputta delivers a discourse (M.i.12ff).
This sutta is often referred to (E.g., Mil.242; Sp.iii.694) as teaching the virtues of contentment.