Rama Setu: Tiruvalangadu copper plate inscription of Rajendra Chola
From the Thiruvalangadu copper plates inscribed in the 6th year of the rule of King Rajendra Chola, son of Raja raja chola discovered in the year 1905:-
In the order of tracing the lineage of the Cholas, verse 80 makes a mention about Rama building a bridge on the ocean.
(V. 80.) The lord of the Raghavas (i.e., Rama) constructing a bridge across the water of the ocean with (the assistance of) able monkeys, killed with great difficulty the king of Lanka (i.e., Ravana) with sharp-edged arrows ; (but) this terrible General of that (king Arunmolivarman) crossed the ocean by ships and burnt the Lord of Lanka (Ceylon). Hence Rama is (surely) surpassed by this (Chola General).