Although Krsna was so pleased with Vasudeva and Devaki that He descended as their son, they could not enjoy Krsna's magnanimous childhood pastimes - SB 10.8.47

Expressions researched:
"Although Kṛṣṇa was so pleased with Vasudeva and Devakī that He descended as their son, they could not enjoy Kṛṣṇa's magnanimous childhood pastimes"

Srimad-Bhagavatam

SB Canto 10.1 to 10.13

Although Kṛṣṇa was so pleased with Vasudeva and Devakī that He descended as their son, they could not enjoy Kṛṣṇa's magnanimous childhood pastimes, which are so great that simply chanting about them vanquishes the contamination of the material world.

SB 10.8.47, Translation and Purport

Although Kṛṣṇa was so pleased with Vasudeva and Devakī that He descended as their son, they could not enjoy Kṛṣṇa's magnanimous childhood pastimes, which are so great that simply chanting about them vanquishes the contamination of the material world. Nanda Mahārāja and Yaśodā, however, enjoyed these pastimes fully, and therefore their position is always better than that of Vasudeva and Devakī.

Kṛṣṇa actually took birth from the womb of Devakī, but just after His birth He was transferred to the home of mother Yaśodā. Devakī could not even have Kṛṣṇa suck her breast. Therefore Parīkṣit Mahārāja was astonished. How had mother Yaśodā and Nanda Mahārāja become so fortunate that they enjoyed the complete childhood pastimes of Kṛṣṇa, which are still glorified by saintly persons? What had they done in the past by which they were elevated to such an exalted position?