Shiva Purana
योगं संद्रढयिष्यामि महायोगविचक्षणः ॥ काश्यां गुहान्तरे संस्थो दिव्यदेशे कुशास्तरिः ॥ २८ ॥
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