A penny shared is a penny well-spent

दातव्यं भोक्तव्यं सति
विभवे सञ्चयो न कर्तव्यः ।
पश्येह मधुकरीणां
सञ्चितमर्थं हरन्त्यन्ये ॥

One should spend (invest) and donate, and never hoard the wealth that is earned. We can see that the honey hived up by bees ends up being stolen by others.

A penny earned is a penny lost.
A penny shared is a penny well-spent.