Recorded in the
北齐书·
琅邪王俨传 (Běi Qí Shū · Lángyá Wáng Yǎn Zhuàn, 'Book of Northern Qi, Biography of Prince Yan of Langye'):
琅邪王年少,
肠肥脑满,
轻为举措 — describing the young prince as 'pot-bellied and fat-headed, careless in his decisions.' The original word order was
肠肥脑满 (chángféi-nǎomǎn); the modern form swapped them.