Valmiki Ramayana 3.68.36
शास्त्र दृष्टेन विधिना जले गृधाय राघवौ ।स्नात्वा तौ गृध्र राजाय उदकम् चक्रुः तदा॥
śāstra dṛṣṭena vidhinā jale gṛdhāya rāghavau |snātvā tau gṛdhra rājāya udakam cakruḥ tadā ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book