Shiva Purana
लोकालोकस्ततश्शैलस्सहस्राण्यचलो हि सः॥ उच्छ्रयेण हि तावंति योजनायुतविस्तृतः ॥ ७५॥
Then there is the world of the worlds and that mountain is unmovable for thousands of years It is as high as that and a thousand yojanas wide.
english translation
lokAlokastatazzailassahasrANyacalo hi saH॥ ucchrayeNa hi tAvaMti yojanAyutavistRtaH ॥ 75॥
hk transliteration by Sanscript