Anandakanda 1.4.5

1.4.5

garbhadrutirdvādaśī syāt bāhyadrutistrayodaśī /
caturdaśaṃ syādrāgākhyaṃ sāraṇā daśapañcamī //

Internal fusion would be the twelfth; external fusion the thirteenth; / The fourteenth is called coloration; moving is the fifteenth;