TIPITAKA Volume 40 : PALI ROMAN Abhidhamma Pitaka Vol 7 : Abhi. Pa.(1) Paṭṭhānaṃ Sampayuttavāro

[475] Kusalaṃ dhammaṃ sampayutto kusalo dhammo uppajjati hetupaccayā kusalaṃ ekaṃ khandhaṃ sampayuttā tayo khandhā tayo khandhe sampayutto eko khandho dve khandhe sampayuttā dve khandhā.