संप्राप्ताय त्वतिथये प्रदद्यादासनोदके ।
अन्नं चैव यथाशक्ति सत्कृत्य विधिपूर्वकम् ॥
When a guest comes to your home, you must comfort him by asking him to take a seat and offer water to quench his thirst. This is a must. Later, you can also offer him food and other pleasantries befitting on your capacity.
- Manu Smriti