Shri ram had stayed here the very first night of his exile. The present names for Tamsa are Mandah of Mandar, and the particular spot is known as Gaura Ghat. Gaura word has been twisted from Gaurav. It is about 20 km from Ayodhya ji.
Valmiki Ramayana 2/46/1 to 17 & 28 Manas 2/84 doha to 2/84/1, 2, 3 & 2/85 doha.