Valmiki Ramayana 6.121.21
विशुद्धा त्रिषु लोकेषु मैथिली जनकात्मजा ।न हि हातुमियं शक्या कीर्तिरात्मवता यथा॥
viśuddhā triṣu lokeṣu maithilī janakātmajā |na hi hātumiyaṃ śakyā kīrtirātmavatā yathā ||
Our plain-language meaning of this verse is waiting for scholar review.
Open in the book