In plain words
The poet, of Tirukkōṭṭiyūr: In Tirukkōṭṭiyūr live those of the flawless four Vedas, who go and join him who broke the kuruntam tree [a demon had entered it], immerse themselves in him, are filled with joy and praise him night and day; and the people who live in the town where devotees dwell who, holding themselves lowest, worship with folded hands the one coloured like a vast dark cloud: what penances did they do, I wonder?