瑜伽師地論略纂 2.87

2.87

鬼中，「口或如鐵，或如炬」不者，如鍼之小，不受食故；吐火如炬，自燒然故。其頸多癭，不能自持，常挭塞故；其腹寬大，持不能勝，鎮曰飢虛，縱食難滿。故多受苦。

Among ghosts, regarding "their mouths are either like iron or like torches": [they are] as small as needles and cannot receive food; vomiting fire like torches, they burn themselves. Their necks mostly have goiters and cannot support themselves, being constantly obstructed; their bellies are huge and cannot be borne, constantly ravenous and hollow, and even if they eat it is hard to fill them. Therefore they experience great suffering.