SB 6.18.76
tad idam mama daurjanyam
balisasya mahiyasi
ksantum arhasi matas tvam
distya garbho mrtotthitah
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
O my mother, O best of all women, I am a fool. Kindly excuse me for whatever offenses I have committed. Your forty-nine sons have been born unhurt because of your devotional service. As an enemy, I cut them to pieces, but because of your great devotional service they did not die.