Astanga Hrudaya
अश्मनो जन्म लोहस्य तत एव च तीक्ष्णता। उपघातोऽपि तेनैव तथा नेत्रस्य तेजसः॥२१॥
Eyes are Aagneya Metals are born from the ores; From ores only they – metals derive their sharpness / bluntness. Similarly, the eyes derive their power and features by Agni – Fire element
english translation
azmano janma lohasya tata eva ca tIkSNatA। upaghAto'pi tenaiva tathA netrasya tejasaH॥21॥
hk transliteration by Sanscript