80
Śrīmad-Bhāgavatam
[ Canto 3, Ch. 2 ]
vasudevasya devakyām jāto bhojendra-bandhane cikīrṣur bhagavān asyāḥ śam ajenābhiyācitaḥ
vasudevasya—of the wife of Vasudeva; devakyām—in the womb of Devakī; jātaḥ—born of; bhoja-indra—the King of the Bhojas; bandhane—in the prison house; cikīrṣuḥ—for doing; bhagavān—the Personality of God-head; asyāḥ—of the earth; śam—welfare; ajena—by Brahmā; abhiyācitaḥ—being prayed for.
TRANSLATION
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.
PURPORT
Although there is no difference between the Lord's pastimes of appearance and disappearance, the devotees of the Lord do not generally discuss the subject matter of His disappearance. Vidura inquired indirectly from Uddhava about the incidence of His disappearance, since he asked him to relate  Kṛṣṇa-kathā , or topics on the history of Lord Kṛṣṇa. Thus Uddhava began the topics from the very beginning of His appearance as the son of Vasudeva and Devakī in the prison of Kamsa, the King of the Bhojas, at Mathurā; The Lord has no business in this world, but when He is so requested by devotees like Brahmā, He descends on the earth for the welfare of the entire universe. This is stated in  Bhagavad-gītā  (4.8):  paritrāṇāya sādhūnām vināśāya ca duṣkṛtām dharma-samsthāpanārthāya sambhavāmi yuge yuge.
TEXT 26
ततो नन्दत्रजमितः पित्रा कंसाद्विबिभ्यता । एकादश समास्तत्र गूढार्चिः सबलोऽवसत् ॥२६॥
tato nanda-vrajam itaḥ pitrā kamsād vibibhyatā ekādaśa samās tatra gūḍhārciḥ sabalo 'vasat