Srimad Bhagavatam Canto 10, Chapter 02, Text 40

SB 10.2.40

matsyasva-kacchapa-nrsimha-varaha-hamsa-
 rajanya-vipra-vibudhesu krtavatarah
tvam pasi nas tri-bhuvanam ca yathadhunesa
 bharam bhuvo hara yaduttama vandanam te
 
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
O supreme controller, Your Lordship previously accepted incarnations as a fish, a horse, a tortoise, Narasimhadeva, a boar, a swan, Lord Ramacandra, Parasurama and, among the demigods, Vamanadeva, to protect the entire world by Your mercy. Now please protect us again by Your mercy by diminishing the disturbances in this world. O Krsna, best of the Yadus, we respectfully offer our obeisances unto You.
 
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
 
In every incarnation, the Supreme Personality of Godhead has a particular mission to execute, and this was true in His appearance as the son of Devaki in the family of the Yadus. Thus all the demigods offered their prayers to the Lord, bowing down before Him, and requested the Lord to do the needful. We cannot order the Supreme Personality of Godhead to do anything for us. We can simply offer Him our obeisances, as advised in Bhagavad-gita (man-mana bhava mad-bhakto mad-yaji mam namaskuru), and pray to Him for annihilation of dangers.
Srimad Bhagavatam Canto 10, Chapter 02, Text 39
Srimad Bhagavatam Canto 10, Chapter 02, Text 41