SB 1.1.18

athākhyāhi harer dhīmann
 avatāra-kathāḥ śubhāḥ
līlā vidadhataḥ svairam
 īśvarasyātma-māyayā
Synonyms: 
atha — therefore; ākhyāhi — describe; hareḥ — of the Lord; dhīman — O sagacious one; avatāra — incarnations; kathāḥ — narratives; śubhāḥ — auspicious; līlā — adventures; vidadhataḥ — performed; svairam — pastimes; īśvarasya — of the supreme controller; ātma — personal; māyayā — energies.
Translation: 
O wise Sūta, please narrate to us the transcendental pastimes of the Supreme Godhead’s multi-incarnations. Such auspicious adventures and pastimes of the Lord, the supreme controller, are performed by His internal powers.
Purport: 

For the creation, maintenance and destruction of the material worlds, the Supreme Lord Personality of Godhead Himself appears in many thousands of forms of incarnations, and the specific adventures found in those transcendental forms are all auspicious. Both those who are present during such activities and those who hear the transcendental narrations of such activities are benefited.