母主

The 'mother-lord', or mother, as contrasted with 主 and 母, lord and mother, king and queen, in the (sa) maṇḍala of Vajradhātu and Garbhadhātu; Vairocana, being the source of all things, has no 'mnother'as progenitor, and is the 部主 or lord of the (sa) maṇḍala; the other four (sa) dhyāni-buddhas have 'mothers' called 部母, who are supposed to arise from the paramitas; thus, Akṣobhya has 金剛波羅蜜 for mother; Ratnasaṃbhava has 寳波羅蜜 for mother; Amitābha has 法波羅蜜 for mother; Amoghasiddhi has 羯磨波羅蜜 for mother.