After you (Devaki and Vasudeva) received that benediction and I (Krsna) disappeared, you engaged yourselves in sex to have a son like Me, and I fulfilled your desire - SB 10.3.40

Expressions researched:
"After you received that benediction and I disappeared, you engaged yourselves in sex to have a son like Me, and I fulfilled your desire"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

After you received that benediction and I disappeared, you engaged yourselves in sex to have a son like Me, and I fulfilled your desire.

SB 10.3.40, Translation and Purport

After you received that benediction and I disappeared, you engaged yourselves in sex to have a son like Me, and I fulfilled your desire.

According to the Sanskrit dictionary Amara-kośa, sex life is also called grāmya-dharma, material desire, but in spiritual life this grāmya-dharma, the material desire for sex, is not very much appreciated. If one has a tinge of attachment for the material enjoyments of eating, sleeping, mating and defending, one is not niṣkiñcana. But one really should be niṣkiñcana. Therefore, one should be free from the desire to beget a child like Kṛṣṇa by sexual enjoyment. This is indirectly hinted at in this verse.