United we stand

परस्परविरोधे तु
वयं पञ्च च ते शतम् ।
अन्यैः साकं विरोधे तु
वयं पञ्चाधिकं शतम् ॥

While fighting among ourselves, we are five and they are hundred. For an enemy outside, we are one hundred and five.

(During their exile in forest, when Yudhisthira discovers that Gandharva tribes have captured the Kuru prince Duryodhana, he says it is the duty of Pandavas to help Kauravas and commands his brothers to fight Gandharvas.)

Unity is strength.
United we stand. Divided we fall.