मा निषाद प्रतिष्ठां त्वम्
अगमः शाश्वतिः समाः |
यत् क्रॉञ्चमिथुनादेकम्
अवधिः काममोहितम् ||
This shloka is actually the result of Maharshi Valmiki's anger!
It's said that शोकः श्लोकात्मगतः - Curse took the form of verse!
Once when the great sage was returning from his bath, he witnessed a male क्रौञ्च bird - which was engaged in mating - succumbing to the arrow of a hunter. The sage was infuriated by this, and uttered a curse, which miraculously consisted of lines following a fixed rhythm. And thence was born the first shloka in history, along with the legendary meter of anuṣṭup (अनुष्टुप्), that prompted Lord Brahma to order Maharshi Valmiki to compose the epic of Ramayana, in the same meter!
निषाद "O hunter,"
त्वम् प्रतिष्ठां शाश्वतिः समाः मा अगमः "you won't get any prestige or permanentness (in other words, you won't get a place in history),"
यत् क्रॉञ्च-मिथुनात् "because, from the union of the Kraunch birds,"
एकम् काममोहितम् अवधिः "you have killed one of those infatuated by desire."
