Bhagavad Gita Chapter 1.10
aparyāptaḿ tad asmākaḿ
balaḿ bhīṣmābhirakṣitam
paryāptaḿ tv idam eteṣāḿ
balaḿ bhīmābhirakṣitam
Translation
Our strength is immeasurable, and we are perfectly protected by Grandfather Bhishma, whereas the strength of the Pandavas, carefully protected by Bhima, is limited.