Garudapurana 1.209.35

1.209.35

vṛttaṃ rajau rajau pāde rajau go laḥ kṛtirbhavet /
trisaptakaiḥ snagdharā syātprakṛtirmnabhanaistriyaiḥ //

The metre in the quarter having ra, ja, ra, ja, ra, ja, a heavy and a light syllable is Kṛti. / Sragdharā has ma, ra, bha, na, and three ya-gaṇas, with [pauses at] three times seven, in the Prakṛti class.