Ramayana
राजन्पुरुषभूतस्त्वं स्त्रीभावं न स्मरिष्यसि । स्त्रीभूतश्च परं मासं न स्मरिष्यसि पौरुषम् ॥ 7-87-28 ॥
"O king, when you are a man you shall not remember your state as a woman, and when you have become a woman, for that whole month you shall not remember your manhood."
english translation