What is the sutra where the Buddha emits fire and water from his body? I've seen pictures that depict the Buddha floating in the air and emitting fire from this torso and water from his legs. The fire and the water might be the other way around. I think the picture illustrates a sutra or other text. Does anyone know what the original text might be?
It's called the "twin miracle": The DPPN entry under Yamaka pātihāriya says,


  The Twin Miracle is described at DA.i.57, and in very great detail at DhA.iii.204; see also J.iv.263ff. etc.