Atithi (अतिथि)
It is mentioned in Manu Smriti chapter 3 verse 102
एकरात्रं तु निवसन्नतिथिर्ब्राह्मणः स्मृतः । अनित्यं हि स्थितो यस्मात् तस्मादतिथिरुच्यते ॥
A Brahman staying for a single night and whose date of coming is not fixed, he has been declared to be a “guest” (Atithi). Because his stay is not long, therefore he is called “Atithi”
