BṚHADĀRAṆYAKA UPANISHAD · 6.4.6

अथ यद्य् उदक आत्मानं पश्येत् तद् अभिमन्त्रयेत -- मयि तेज इन्द्रियं यशो द्रविणं सुकृतम् इति ।
श्रीर् ह वा एषा स्त्रीणां यन् मलोद्वासाः ।
तस्मान् मलोद्वाससं यशस्विनीम् अभिक्रम्योपमन्त्रयेत ॥

atha yady udaka ātmānaṃ paśyet tad abhimantrayeta -- mayi teja indriyaṃ yaśo draviṇaṃ sukṛtam iti ।
śrīr ha vā eṣā strīṇāṃ yan malodvāsāḥ ।
tasmān malodvāsasaṃ yaśasvinīm abhikramyopamantrayeta ॥

Now, if one should see himself in water, he should recite over it the formula: 'In me be vigor, power, beauty, wealth, merit!' This, verily, indeed, is loveliness among women: when she has removed the clothes of her impurity. Therefore when she has removed the clothes of her impurity and is beautiful, one should approach and invite her.

Robert Ernest Hume · The Thirteen Principal Upanishads (1921), Bṛhadāraṇyaka VI.4