BT Šab 110a(29) :תשקול ממזי{{י}}ה ומטופרה ותש{ר}<ד>י ביה ותימא ליה דסתנא אנא‏ : she should take some of her hair and some of her nails and throw them at it and say to it: I am menstruating
See the entire entry for daštānā n.m. menstrual