From
孟子·
滕文公上 (Mèngzǐ · Téng Wén Gōng shàng):
阳虎曰:『
为富不仁矣,
为仁不富矣。』 — Mencius quotes the minister Yang Hu making the observation. Used in classical political philosophy to argue that the pursuit of wealth and the pursuit of virtue tend to be in tension. The first half
为富不仁 (wéifùbùrén) circulates as a standalone four-character idiom much more often than the full pair.