The Personality of Godhead, Lord Śrī Kṛṣṇa, being prayed to by Brahmā to bring welfare to the earth, was begotten by Vasudeva in the womb of his wife Devakī in the prison of the King of Bhoja.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
वसुदेवस्य देवक्यां जातो भोजेन्द्रबन्धने । चिकीर्षुर्भगवानस्याः शमजेनाभियाचितः
vasudevasya devakyāṃ jāto bhojendrabandhane | cikīrṣurbhagavānasyāḥ śamajenābhiyācitaḥ
SB 3.2.25