大方便佛報恩經 3.23

3.23

爾時世尊告彌勒菩薩善男子等大眾：「當知爾時波羅奈大王者，今現我父悅頭檀是；爾時母者，今現我母摩耶是；忍辱太子者，今我身是。菩薩於無量阿僧祇劫孝養父母，衣被、飲食、房舍、臥具，乃至身肉骨髓，其事如是，以此因緣自致成佛。今此寶塔從地踊出者，即是我為其父母捨此骨髓及其身命，即於此處起塔供養。我今成佛，即踊現其前。」

At that time the Bhagavat addressed the Bodhisattva Maitreya, the good sons, and the great assembly: "You should know that the great king of Vārāṇasī at that time was none other than my present father Śuddhodana; the mother at that time was none other than my present mother Māyā; and Prince Kṣānti was none other than myself. For immeasurable asaṃkhyeya kalpas, the Bodhisattva was filial to and supported his parents with clothing, food and drink, dwellings, and bedding, and even with his own flesh, bones, and marrow—such was the matter. Through these causes and conditions, he naturally attained buddhahood. This jeweled stupa that now wells up from the earth is the place where I renounced this marrow and this physical life for the sake of my parents, and where a stupa was erected on this very spot to make offerings. Now that I have attained buddhahood, it wells up and appears before us."