Śrīmad-Bhāgavatam · Text 1.8.33
Who is speaking and story frame
अपरे वसुदेवस्य देवक्यां याचितोऽभ्यगात् ।
अजस्त्वमस्य क्षेमाय वधाय च सुरद्विषाम् ॥ ३३ ॥
apare vasudevasya
devakyāṁ yācito ’bhyagāt
ajas tvam asya kṣemāya
vadhāya ca sura-dviṣām
Others say that since both Vasudeva and Devakī prayed for You, You have taken Your birth as their son. Undoubtedly You are unborn, yet You take Your birth for their welfare and to kill those who are envious of the demigods.
Read Śrīla Prabhupāda's purport on Vedabase.io