Srimad Bhagavatam Canto 03, Chapter 04, Text 12

SB 3.4.12

sa esa sadho caramo bhavanam
 asaditas te mad-anugraho yat
yan mam nrlokan raha utsrjantam
 distya dadrsvan visadanuvrttya
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O honest one, your present life is the last and the supermost because in this term of life you have been awarded My ultimate favor. Now you can go to My transcendental abode, Vaikuntha, by leaving this universe of conditioned living entities. Your visit to Me in this lonely place because of your pure and unflinching devotional service is a great boon for you.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
When a person is fully conversant with knowledge of the Lord as far as can be known by a perfect living entity in the liberated state, he is allowed to enter into the spiritual sky, where the Vaikuntha planets exist. The Lord was sitting in a lonely place just about to disappear from the vision of the inhabitants of this universe, and Uddhava was fortunate to see Him even at that time and thus receive the Lord’s permission to enter Vaikuntha. The Lord is everywhere at all times, and His appearance and disappearance are merely the experience of the inhabitants of a particular universe. He is just like the sun. The sun does not appear or disappear in the sky; it is only in the experience of men that in the morning the sun rises and in the evening the sun sets. The Lord is simultaneously both in Vaikuntha and everywhere within and without Vaikuntha.
Srimad Bhagavatam Canto 03, Chapter 04, Text 11
Srimad Bhagavatam Canto 03, Chapter 04, Text 13