स्वयमातिथ्यमादिश्य सर्वमस्य सुसत्कृतम् । सौमित्रिं च महाभागां सीतां च समसान्त्वयत् ॥

श्रीमद्वाल्मीकिरामायणे अयोध्याकाण्डे सप्तदशोत्तरशततमस्सर्गः (६ श्लोक)

This shloka says that Atri Maharshi performed appropriate Atithiseva to Sita-Raama-Lakshmanas, when they visited His ashram.

Even though Atri maharshi was a great maharshi, and a great Guru, He performed Atithiseva as per shastras. We should also respect an Atithi who comes to our house as if He is Lord Vishnu Himself!

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