मनु स्मृति - अतिथि सत्कार

न वै स्वयं तदश्नीयात् अतिथिं यन्न भोजयेत् ।
धन्यं यशस्यमायुष्यं स्वर्ग्यं वातिथिपूजनम् ॥

- मनु स्मृति

One must never eat food before the guest has eaten. Serving the guest will lead to great wealth, fame and one can attain heaven-like happiness.

- Manu Smriti