Bṛhad-bhāgavatāmṛta Part 2 Chapter 1 Text 14

vaikuṇṭhaṁ durlabhaṁ muktaiḥ
sāndrānanda-cid-ātmakam
niṣkāmā ye tu tad-bhaktā
labhante sadya eva tatTRANSLATION
That abode, Vaikuṇṭha, is made of concentrated ecstasy and pure consciousness. Even for liberated souls it is difficult to attain. But the Lord’s devotees who are free from selfish desires reach it at once.