Sri Chandogya Upanishad says…..

By rendering service to Sri Shyama (Sri Krishna), one attains His transcendental abode, which is full of spiritual bliss and astonishing, varietgated pastimes.

…………….. And within that spiritual world, one attains the eternal shelter of Sri Shyama.

— Sri Chandogya Upanishad (8.13.1)

Source : Back to Godhead / July-August 2016