RV 7.87.4
उवाच मे वरुणो मेधिराय त्रिः सप्त नामाघ्न्या बिभर्ति । विद्वान् पदस्य गुह्या न वोचद् युगाय विप्र उपराय शिक्षन् ॥
uvāca me varuṇo medhirāya triḥ sapta nāmāghnyā bibharti | vidvān padasya guhyā na vocad yugāya vipra uparāya śikṣan ||
Devanagari rendered by HREEM from the edition's roman (IAST) text; the IAST is the edition's own.
To me who understand hath Varuna spoken, the names borne by the Cow are three times seven. The sapient God, knowing the place's secret, shall speak as 'twere to teach the race that cometh.
Translated by Ralph T. H. Griffith (1896)