śruta-sambhṛtayā ciram

sri bhagavan uvaca-the Supreme Personality of Godhead said; animitta-nimittena-without desiring the fruits of activities; sva-dharmena-by executing one's prescribed duties; amala-atmana-with a pure mind; tivraya-serious; mayi-unto Me; bhaktya-by devotional service; ca-and; sruta-hearing; sambhrtaya-endowed with; ciram-for a long time.