I have heard that on one occasion the Blessed One was staying near Sāvatthī at Jeta's Grove, Anāthapiṇḍika's monastery. Then Ven. Ānanda, emerging from his seclusion in the late afternoon, went to the Blessed One and, on arrival, having bowed down to him, sat to one side. As he was sitting there he said to the Blessed One, "It's amazing, sir. It's astounding — how short-lived the Blessed One's mother was. Seven days after the Blessed One's birth she died and reappeared among the Contented [Tusita] (deva-) group."
"That's the way it is, Ānanda. That's the way it is, for the mothers of bodhisattas are short-lived. Seven days after the bodhisattas' birth, the bodhisattas' mothers pass away and reappear among the Contented (deva-) group."
Then, on realizing the significance of that, the Blessed One on that occasion exclaimed: