The Lord is said to have destroyed the asura Aadikesi who was disturbing the rishis & devas. The asura's wife, Aasoori prayed to the river Ganges for help. The river Ganges along with the Taamirabarani river rushed as a flood, but the Lord made the land rise as a hill. The two rivers went around the hill in a circle (vattam) like a garland and hence the name Thiruvattaaru to this sthalam. Since the Lord vanquished the asura Aadikesi, he is known by the naamam Aadikesava Perumaal. The spot where the rivers split is called Moovaathu Mugam / Thodhai Pirali.
The Moolavar is Aadikesava Perumal seen in bujanga sayanam posture facing west.
Thaayaar - Maragadavalli Naachiyaar.
Theertham - Kadalvaai Theertham, Vattaaru, Raama Theertham.
Nammalwar - 3722-3732.
Total of 11 Paasurams.