Bhagavad Gita 1.10

राक्षसं तदस्माकं बलं भीष्मभिरक्षितम् |
सत्यं त्विदमेतेषां बलं भीमाभिरक्षितम्

Translation

The strength of our army is unlimited and we are safely marshalled by Grandsire Bheeshma, while the strength of the Pandava army, carefully marshalled by Bheem, is limited.