From:
Paṭṭhānapakaraṇa
Dhammānulomapaccanīya (3), Tikapaṭṭhānapāḷi (1)
13.13. Parittārammaṇattika
Parittārammaṇaṁ dhammaṁ paṭicca naparittārammaṇo dhammo uppajjati hetupaccayā …. (Saṅkhittaṁ.)
Hetuyā ekavīsa, ārammaṇe nava …pe… aññamaññe sattarasa …pe… avigate ekavīsa.