"Hamare sath Sri Raghunath to kis baat ki chinta" this was told by Sage Matang to his disciple Shabri. She was a tribal woman, who lived in a small hut in Sage Matang's ashram in the forest. 

This episode of Holy Tales by Himanshu Sharma will tell you why she use to collect berries for Shri Ram & how she became his devotee even before his incarnation.