Ramayana
लक्ष्मणस्य च नाराचा बहवस्सन्ति तद्विधाः । वज्राशनिसमस्पर्शा गिरीणामपि दारणाः ॥ ४-५४-१५
'Lakshmna has many such iron arrows that are equal to the thunderbolt. They can even split the mountains. [4-54-15]
english translation
lakSmaNasya ca nArAcA bahavassanti tadvidhAH । vajrAzanisamasparzA girINAmapi dAraNAH ॥ 4-54-15
hk transliteration by Sanscript