Acchariyaabbhutasutta

Suttapiṭaka · Majjhimanikāya · Vol. 14 · Section 372

[372] "Venerable sir, I have heard this in the presence of the Blessed One, received it in his presence: 'Whereas, Ānanda, other women give birth sitting or lying down, the mother of the Bodhisatta (bodhisatta) does not give birth to the Bodhisatta in that way; only while standing does the Bodhisatta's mother give birth to the Bodhisatta.' This too, venerable sir, … This too, venerable sir, I remember as a wonderful and marvellous quality (acchariya-abbhūtadhamma) of the Blessed One."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 3 other places