Valmiki Ramayana Bala Kanda Sarga 16 Shloka 10
Original Shlokaस कृत्वा निश्चयं विष्णुरामन्त्र्य च पितामहम्। अन्तर्धानं गतो देवै: पूज्यमानो महर्षिभि:।।1.16.10।।
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स: विष्णु: Vishnu, निश्चयं कृत्वा having decided, पितामहम् Grandsire, Brahma, आमन्त्र्य bidding farewell, देवै: by devatas, महर्षिभि: by maharshis, पूज्यमान: worshipped by, अन्तर्धानं गत: disappeared.
After Visnu had decided (to incarnate) and he was worshipped by devatas and maharshis he disappeared bidding farewell to Brahma.