Shiva Purana
ध्यायतो वंशनादं तु सर्वतत्त्वं प्रजायते ॥ दुन्दुभिं ध्यायमानस्तु जरामृत्युविवर्जितः ॥ ५०॥
All principles are understood by one who meditates on Vaṃśa Nāda. One who meditates on Dundubhi is devoid of old age and death.
english translation
dhyAyato vaMzanAdaM tu sarvatattvaM prajAyate ॥ dundubhiM dhyAyamAnastu jarAmRtyuvivarjitaH ॥ 50॥
hk transliteration by Sanscript