 Sundarar refers to his father Sadaiyan in the "Tiruthonda Thogai", a hymn to Nayanar saints, which is the first compilation of the list.In many of his verses, he introduces himself the son of Sadaiyan.Sadaiya Nayanar is worshipped on Thiruvathira, the Purnima (full moon day) of the Tamil month of Margazhi.