Shiva Purana

siva.sh/siva-purana/saturda-samhita/4/28

योगं संद्रढयिष्यामि महायोगविचक्षणः ।। काश्यां गुहान्तरे संस्थो दिव्यदेशे कुशास्तरिः ।। २८ ।।

sanskrit

Seated on a Kuśa mat in a divine spot in the middle of a mountain-cavern in Kāśī I, an expert in the great Yoga, will stabilise the path of Yoga.

english translation

yogaM saMdraDhayiSyAmi mahAyogavicakSaNaH || kAzyAM guhAntare saMstho divyadeze kuzAstariH || 28 ||

hk transliteration by Sanscript