This day the fruit of birth I gain, Nor have I served the saints in vain. I reap rich fruits of toil and vow, And heaven itself awaits me now, When I, O chief of men, have done Honour to thee the godlike one.

In plain words: Shabari says that today her life has found its purpose and her service to the sages was not wasted. By honoring Rama, whom she sees as divine, she has earned heaven.