Check thou mine elder brother’s might; That ne’er again his deadly spite May rob me of mine ancient right, Or vex my soul with woe.” The league was struck, a league to bring To Sítá fiends, and Vánar king Apportioned bliss and bale.

In plain words: Sugriva asks Rama to stop his older brother Bali so he can never again take away Sugriva's rights or hurt him. The friendship pact is made, and it will bring joy to Sita and the monkey king but sorrow to the demons.