durbhaṇatvānudāttatvakliṣṭatvāśravyatādayaḥ / vedadharmā hi dṛśyante nāstikādivacastvapi //
For the characteristics of the Veda such as difficulty of pronunciation, lack of proper accent, obscurity, and unpleasantness to hear are indeed found even in the speech of atheists and others.