Tirukkural-On Virtue-An Open House Or Hospitality-Kural 89

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Wealthy men, who fail in extending hospitality,
Are fools; they live in poverty amidst plenty.

In the midst of all their wealth it would be the most pitiable state of poverty indeed if they do not find it in themselves to be hospitable to guests. Such men are, in their heart, exceedingly mean and deserve to be despised for their poverty in plenty.