The holy power, O Raghu’s son, By their ascetic virtue won, Still keeps their well-loved altar bright, Filling the air with beams of light. And those seven neighbouring lakes behold Which, when the saints infirm and old, Worn out by fasts, no longer sought, Moved hither drawn by power of thought.

In plain words: Shabari says the holy power the sages earned through their self-discipline still makes their altar glow with light. She points to seven lakes that the sages, too weak from age and fasting to walk to them, pulled close by the power of their minds.