Garudapurana 1.209.16

1.209.16

bhujaṅgaprayātaṃ vṛttaṃ catubhiryaiḥ prakīrtitam /
prayaṃvadā nabhajraiśca maṇimālā tayau tayau //

The metre Bujaṅgaprayāta is declared to have four ya-gaṇas. / Priyamvadā has na, bha, ja, and ra; and Maṇimālā has ta, ya, ta, and ya.