Originally Posted by podalangai
From memory, there are four references to the story of Rama in the Ettuthokai, two to Rama himself, and two to other incidents associated with the Ramayana. Verse 378 from Purananuru mentions a group of monkeys who found the ornaments scattered by Sita, and wore them incorrectly (bangles on the ears, necklace around the waist). Note that this incident is not described in any known version of the Ramayana.
The second reference is Verse 70 of Akananuru, which speaks of the sound heard by Rama at Kodi.
The third reference is in Kalitthokai, verse 38, which describes how the "arakkar koman" attempted to uproot the Himalayan mountain on which Siva and Uma were resting. This seems very much like a reference to the famous incident involving Ravana, although neither Ravana nor Rama are named.
The fourth reference is in Paripadal 19, which describes a group of pilgrims to the Murugan temple at Thirupparankunram who see a painting depicting Ahalya (Akaligai) and Indra being cursed by Gautama, with Ahalya becoming a stone. Rama isn't directly mentioned, but the story of Ahalya is associated with the Ramayana. Interestingly enough, once again this reference does not follow Valmiki - Valmiki refers to Ahalya becoming invisible. The legend that she became a stone is first found in the Kambaramayanam, and only subsequently in later northern texts, such as the Adhyatma Ramayana.