Ramayana
एष पूर्वस्य देवस्य लोककर्तुः सनातनः । शरस्तेजोमयो वत्सा येन वै भयमागतम् ॥ 7-69-26 ॥
'This, my children, is the eternal, energy-filled arrow of the primeval god, the maker of the worlds, by which this fear has come upon you.'
english translation