Shiva Purana
राजितस्य द्वादशभिस्तस्य हृत्पंकजोदरे ॥ प्रणवं पूर्वमुद्धृत्य ह्रांह्रींसस्तदनन्तरम् ॥ २४॥
The lotus of his heart was decorated with twelve gems First one should chant the oṁkāra, and then the hrāṁhrīṁsa.
english translation
rAjitasya dvAdazabhistasya hRtpaMkajodare ॥ praNavaM pUrvamuddhRtya hrAMhrIMsastadanantaram ॥ 24॥
hk transliteration by Sanscript