aho asmad abhūd bhūri
pitror vṛjinam āryayoḥ
yad-dhetoḥ putra-maraṇaḿ
yad-dhetor bandhanaḿ tayoḥ
aho -- ah; asmat -- because of Me; abhut -- there was; bhuri -- great; pitroh -- for My parents; vrijinam -- suffering; aryayoh -- for the offenseless ones; yat-hetoh -- because of whom; putra -- of their sons; maranam -- the death; yat-hetoh -- because of whom; bandhanam -- bondage; tayoh -- their.
Because Kamsa had heard a prophecy that the eighth son of Devaki would kill him, he tried to kill all her children. For the same reason, he imprisoned her and her husband, Vasudeva.