Peraciriyar states that Agastiyar taught this grammar to Tolkappiyar, one of his twelve disciples, at Pothigai hills, who then wrote Tolkāppiyam, although mentions that some scholars believe Tolkappiyar based the Tamil grammar on other forms no longer extant; Agastiyar is not mentioned in Tolkāppiyam. Paripāṭal of the Eṭṭuttokai anthology speaks of vaynta Potiyin munivan, the famous sage of Poti. In Naccinarkiniyar's commentaries, quoting lines of Nakkeerar, Agastiyar is associated with the Pothigai mountains and pure Tamil. In Sundarar's Tevaram, the Pothigai mountains are mentioned.