Shiva Purana
इतरेषु ससंध्येषु ससंध्यांशेषु च त्रिषु ॥ एकापायेन वर्तंते सहस्राणि शतानि च ॥ १४ ॥
In the three other yugas, their Sandhyās and Sandhyāṃśas the thousands and the hundreds become reduced by one.
english translation
itareSu sasaMdhyeSu sasaMdhyAMzeSu ca triSu ॥ ekApAyena vartaMte sahasrANi zatAni ca ॥ 14 ॥
hk transliteration by Sanscript