CC Adi-lila 05.139 - SB 10.15.14
Srimad-Bhagavatam
SB Cantos 10.14 to 12 (Translations Only)
SB 10.15.14, Translation:
When His elder brother, fatigued from playing, would lie down with His head upon the lap of a cowherd boy, Lord Kṛṣṇa would help Him relax by personally massaging His feet and offering other services.
Sri Caitanya-caritamrta
CC Adi-lila
CC Adi 5.138, Purport:
This and the following quotation are from the Bhāgavatam (10.11.40 and 10.15.14).
CC Adi 5.139, Translation:
“Sometimes when Lord Kṛṣṇa's elder brother, Lord Balarāma, felt tired after playing and lay His head on the lap of a cowherd boy, Lord Kṛṣṇa Himself served Him by massaging His feet.”