SB 10.84.63
prag akalpac ca kusalam
bhratar vo nacarama hi
adhuna sri-madandhaksa
na pasyamah purah satah
Translation:
Previously, dear brother, we did nothing to benefit you because we were unable to, yet even now that you are present before us, our eyes are so blinded by the intoxication of material good fortune that we continue to ignore you.
Purport:
While living under the tyranny of Kamsa, Vasudeva was unable to do anything to help Nanda and his subjects defend themselves against the many demons sent from Mathura to kill Krsna and Balarama.