Rigveda 9.89.2

राजा॒ सिन्धू॑नामवसिष्ट॒ वास॑ ऋ॒तस्य॒ नाव॒मारु॑ह॒द्रजि॑ष्ठाम् ।अ॒प्सु द्र॒प्सो वा॑वृधे श्ये॒नजू॑तो दु॒ह ईं॑ पि॒ता दु॒ह ईं॑ पि॒तुर्जाम्॥

rājā sindhūnāmavasiṣṭa vāsa ṛtasya nāvamāruhadrajiṣṭhām |apsu drapso vāvṛdhe śyenajūto duha īṃ pitā duha īṃ piturjām ||

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