Bhagavad Gita: Chapter 1, Verse 11

अयनेषु च सर्वेषु यथाभागमवस्थिताः ।
भीष्ममेवाभिरक्षन्तु भवन्तः सर्व एव हि ॥ १-११॥

ayaneṣu ca sarveṣu yathābhāgam avasthitāḥ
bhīṣmam evābhirakṣantu bhavantaḥ sarva eva hi 1.11

All you must give full support to grandfather Bhisma, even as you defend your strategic points.