Ramayana
नानृग्वेदविनीतस्य नायजुर्वेद्धारिणः । नासामवेदविदुषश्शक्यमेवं विभाषितुम् ॥ ४-३-२८
'Unless wellversed in Rigveda, Yajurveda and Samaveda, for sure, it is not possible for anyone to articulate so well. [4-3-28]
english translation
nAnRgvedavinItasya nAyajurveddhAriNaH । nAsAmavedaviduSazzakyamevaM vibhASitum ॥ 4-3-28
hk transliteration by Sanscript