Srimad Bhagavatam Canto 08, Chapter 06, Text 08

SB 8.6.8

 gunaya nirvana-sukharnavaya
anor animne ’pariganya-dhamne
 mahanubhavaya namo namas te
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Lord Brahma said: Although You are never born, Your appearance and disappearance as an incarnation never cease. You are always free from the material qualities, and You are the shelter of transcendental bliss resembling an ocean. Eternally existing in Your transcendental form, You are the supreme subtle of the most extremely subtle. We therefore offer our respectful obeisances unto You, the Supreme, whose existence is inconceivable.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
The Lord says in Bhagavad-gita (4.6):
ajo ’pi sann avyayatma
 bhutanam isvaro ’pi san
prakrtim svam adhisthaya
 sambhavamy atma-mayaya
“Although I am unborn and My transcendental body never deteriorates, and although I am the Lord of all sentient beings, I still appear in every millennium in My original transcendental form.” In the following verse in Bhagavad-gita (4.7), the Lord says:
yada yada hi dharmasya
 glanir bhavati bharata
abhyutthanam adharmasya
 tadatmanam srjamy aham
“Whenever and wherever there is a decline in religious practice, O descendant of Bharata, and a predominant rise of irreligion — at that time I descend Myself.” Thus although the Supreme Lord is unborn, there is no cessation to His appearance in different forms as incarnations like Lord Krsna and Lord Rama. Since His incarnations are eternal, the various activities performed by these incarnations are also eternal. The Supreme Personality of Godhead does not appear because He is forced to do so by karma like ordinary living entities who are forced to accept a certain type of body. It is to be understood that the Lord’s body and activities are all transcendental, being free from the contamination of the material modes of nature. These pastimes are transcendental bliss to the Lord. The word apariganya-dhamne is very significant. There is no limit to the Lord’s appearance in different incarnations. All of these incarnations are eternal, blissful and full of knowledge.
Srimad Bhagavatam Canto 08, Chapter 06, Text 03-07
Srimad Bhagavatam Canto 08, Chapter 06, Text 09