Mahabharata 1.207.19

स तस्मै भगवान्प्रादादेकैकं प्रसवं कुलेएकैकः प्रसवस्तस्माद्भवत्यस्मिन्कुले सदा

sa tasmai bhagavānprādādekaikaṃ prasavaṃ kuleekaikaḥ prasavastasmādbhavatyasminkule sadā

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