Four brahmins want to be born in heaven, but the Buddha find a way to liberate them.
T212. Producing Light: (C1:2) Impermanence
In story 2 of Chapter 1, the Buddha tells the monks that a group of colorfully dressed youths look just like the gods. Beings who hear this decide to be born in heaven or among humans and purse nirvana later. He speaks the first verse on impermanence to dissuade them.
T212. Producing Light: (C1:1) Maitreya
In the opening story of Chu Fonian's "Producing Light," one of two Chinese Udana collections, the Buddha describes the future era when Maitreya will be born.