"No, Mahamati, my Womb of Tathagatahood is not the same as the Divine Atman as taught by the philosophers. What I teach is Tathagatahood in the sense of Dharmakaya, Ultimate Oneness, Nirvana, emptiness, unbornness, unqualifiedness, devoid of will-effort. ...The doctrine of the Tathagata-womb is disclosed in order to awaken philosophers from their clinging to the notion of a Divine Atman as a transcendental personality, so that their minds that have become attached to the imaginary notion of a "soul" as being something self-existing, may be quickly awakened to a state of perfect enlightenment."
Gautama Buddha - लंकावतारसूत्र | Laṅkāvatāra Sūtra