The Tipiṭaka in Three Languages

ทูลถามถึงสิกขาบท

Vinayapiṭaka · Cūḷavagga (2) · Vol. 7 · Section 604

[604] Now at that time bhikkhunīs (bhikkhunī) sat in the cross-legged posture (pallaṅka), taking pleasure in the contact of the heels. They reported this matter to the Blessed One. "Bhikkhus, a bhikkhunī should not sit in the cross-legged posture; whoever should so sit commits an offense of wrong-doing (dukkaṭa)."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.

This passage also appears in 5 other places