Mahabharata 1.77.5

ऋतुकाले तु संप्राप्ते देवयानी वराङ्गनालेभे गर्भं प्रथमतः कुमारं च व्यजायत

ṛtukāle tu saṃprāpte devayānī varāṅganālebhe garbhaṃ prathamataḥ kumāraṃ ca vyajāyata

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