SB 12.2.31

yadā — when; deva-ṛṣayaḥ sapta — the seven sages among the demigods; maghāsu — in the lunar mansion Maghā; vicaranti — are traveling; hi — indeed; tadā — then; pravṛttaḥ — begins; tu — and; kaliḥ — the Age of Kali; dvādaśa — twelve; abda-śata — centuries [These twelve hundred years of the demigods equal 432,000 earth years]; ātmakaḥ — consisting of.