Bhagavad Gita · 1.11

अयनेषु च सर्वेषु यथाभागमवस्थिताः।भीष्ममेवाभिरक्षन्तु भवन्तः सर्व एव हि॥

ayaneṣhu cha sarveṣhu yathā-bhāgam avasthitāḥ bhīṣhmam evābhirakṣhantu bhavantaḥ sarva eva hi

Therefore, all of you, stationed at your respective positions in the military formation, must protect Bhishma at all costs.

— Bhagavad Gita 1.11

Source: Sacred-Texts.com (Sanskrit) + Bhagavad-Gita.io (translations)