The Upanishads, Part 1 (SBE01), by Max Müller, [1879], at sacred-texts.com
1, 2. Next follows the Vâmadevya as interwoven in generation 5.
29:5 Upamantrayate sa hiṅkâro, gñapayate sa prastâvah, striyâ saha p. 30 sete sa udgîthah, pratistrî saha sete sa pratihârah, kâlam gakkhati tan nidhanam, pâram gakkhati tan nidhanam. Etad vâmadevyam mithune protam. 2. Sa ya evam etad vâmadevyam mithune protam veda, mithunî bhavati, mithunân mithunât pragâyate, sarvam âyur eti, gyog gîvati, mahân pragayâ pasubhir bhavati, mahân kîrttyâ. Na kâmkana pariharet tad vratam.