Shiva Purana
उपरिष्टात्ततश्शुक्रो द्विलक्षाभ्यंतरे स्थितः॥ द्विलक्षयोजनं तस्मादधः सोमसुतः स्मृतः ॥ १०॥
Above that is stationed Śukra (Venus) at a distance of two hundred thousand Yojanas. Two hundred thousand Yojanas below it is stationed Budha (Mercury) the son of the moon.
english translation
upariSTAttatazzukro dvilakSAbhyaMtare sthitaH॥ dvilakSayojanaM tasmAdadhaH somasutaH smRtaH ॥ 10॥
hk transliteration by Sanscript