Mahabharat
यॊ ऽयं वहति ते पार्ष्णिं दक्षिणाम अञ्चितॊद्यतः बलाहकाद अपि मतः स जवे वीर्यवत्तरः ॥ ४-४०-२१ ॥
'And this fourth horse, yoked to the rear right pole, is regarded as superior to Valahaka in both speed and strength.' ॥ 4-40-21 ॥
english translation
yò 'yaM vahati te pArSNiM dakSiNAma aJcitòdyataH balAhakAda api mataH sa jave vIryavattaraH ॥ 4-40-21 ॥
hk transliteration by Sanscript