Rigveda 1.83.3

अधि॒ द्वयो॑रदधा उ॒क्थ्यं १ वचो॑ य॒तस्रु॑चा मिथु॒ना या स॑प॒र्यत॑: ।असं॑यत्तो व्र॒ते ते॑ क्षेति॒ पुष्य॑ति भ॒द्रा श॒क्तिर्यज॑मानाय सुन्व॒ते॥

adhi dvayoradadhā ukthyaṃ 1 vaco yatasrucā mithunā yā saparyata: |asaṃyatto vrate te kṣeti puṣyati bhadrā śaktiryajamānāya sunvate ||

Our plain-language meaning of this verse is waiting for scholar review.