人本(rén běn) “the nature of human beings”
not found at HD. 1.1037.; not found at DK. 1.567.;
92b24.其乐下劣小乘行者，则自亡失，远乎人种，不解人本，为欲所缚(p)
K. 187.1.sattva-dhātu~; L. 25c24.众生之性;