Shiva Purana
सप्तर्षिमण्डलं तस्माल्लक्षेणैकेन संस्थितम् ॥ ऋषिभ्य तु सहस्राणां शतादूर्ध्वं ध्रुवः स्थितः ॥ ६॥
The sphere of the seven sages (The Ursa Major) is situated a hundred thousand Yojanas above it. The Pole Star (Dhruva) is situated a hundred thousand Yojanas above the sages.
english translation
saptarSimaNDalaM tasmAllakSeNaikena saMsthitam ॥ RSibhya tu sahasrANAM zatAdUrdhvaM dhruvaH sthitaH ॥ 6॥
hk transliteration by Sanscript