SB 10.7.5
nandasya patni krta-majjanadikam
vipraih krta-svastyayanam supujitaih
annadya-vasah-srag-abhista-dhenubhih
sañjata-nidraksam asisayac chanaih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After completing the bathing ceremony for the child, mother Yasoda received the brahmanas by worshiping them with proper respect and giving them ample food grains and other eatables, clothing, desirable cows, and garlands. The brahmanas properly chanted Vedic hymns to observe the auspicious ceremony, and when they finished and mother Yasoda saw that the child felt sleepy, she lay down on the bed with the child until He was peacefully asleep.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
An affectionate mother takes great care of her child and is always anxious to see that the child is not disturbed even for a moment. As long as the child wants to remain with the mother, the mother stays with the child, and the child feels very comfortable. Mother Yasoda saw that her child felt sleepy, and to give Him all facilities for sleep, she lay down with the child, and when He was peaceful, she got up to attend to her other household affairs.