Shiva Purana
ब्रह्मभिश्च षडंगैश्च ततो मातृकया सह ॥ प्रणवेन शिवेनैव शक्तियुक्तेन च क्रमात् ॥ ७७ ॥
Then the brahmins and the six gods accompanied by the mother The oṁkāra is chanted by Lord Śiva and by Lord Śiva in order.
english translation
brahmabhizca SaDaMgaizca tato mAtRkayA saha ॥ praNavena zivenaiva zaktiyuktena ca kramAt ॥ 77 ॥
hk transliteration by Sanscript