Shiva Purana

siva.sh/siva-purana/rudra-samhita/157/51

पूजनीयो विशेषेण स गणश्शिवपूजने ।। नार्चयंतीह ये पूर्वं तेषामर्चा वृथा भवेत् ।।५१।।

sanskrit

This Gaṇa shall be specially worshipped in the course of the adoration of Śiva. Those who do not worship him at the outset will find their worship in vain.

english translation

pUjanIyo vizeSeNa sa gaNazzivapUjane || nArcayaMtIha ye pUrvaM teSAmarcA vRthA bhavet ||51||

hk transliteration by Sanscript