Digha Nikaya III. 188

The wise and virtuous shine like a blazing fire. He who acquires his wealth in harmless ways like to a bee that honey gathers, riches mount up for him like ant hill's rapid growth. With wealth acquired this way, a layman fit for household life, in portions four divides his wealth: thus will he friendship win. One portion for his wants he uses, two portions on his business spends, the fourth for times of need he keeps.

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