20-21-1.Ajjhattattikadvaya-hetudukaṃ
55. Naajjhattaṃ nahetuṃ dhammaṃ paṭicca bahiddhā hetu dhammo uppajjati hetupaccayā .
Nabahiddhā nahetuṃ dhammaṃ paṭicca ajjhatto hetu dhammo uppajjati hetupaccayā … hetuyā dve .
56. Naajjhattārammaṇaṃ nahetuṃ dhammaṃ paṭicca ajjhattārammaṇo hetu dhammo uppajjati hetupaccayā … dve .
Nabahiddhārammaṇaṃ nahetuṃ dhammaṃ paṭicca bahiddhārammaṇo hetu dhammo uppajjati hetupaccayā … hetuyā cha .