The late childbirth leads to doubts in the Śākya clan as to who is the father, as told in the Mūlasarvāstivāda tradition, in the "Mahāprajñāpāramitāupadeśa" and in the later Chinese "Zabaozang jing" (). Since Rāhula's birth was not regarded by Buddhists to be a virginal or miraculous birth, tradition had to explain that Prince Siddhārtha was actually the father. Yaśodharā responded by putting her child on a stone in a pond of water and making an act of truth that if Rāhula really was his child, that Rāhula and the stone may not sink, but rather float back-and-forth. After she made the declaration, the child floated according to her vow. Strong notes that this is a symbolic parallel with the attainment of enlightenment by the Buddhadescribed as the "further shore"and the return to teach humankind. The "Mahāprajñāpāramitāupadeśa" contains another account, in which Prince Siddhārtha has several wives, and a wife other than Yaśodharā is the one defending her, being witness of her purity in conduct.