In Tulasee's Maanas, Tulasee Daas Jee mentions all the four brothers' names five times 
(1) At the time of their naming ceremony;
(2) At the time of their marriage - after Raam's marriage has been performed
(after Dohaa No 324, in Chhand Nos 2-4)
(3) At the time of Bharat goes to forest to bring Raam back to Ayodhyaa
(4) When Raam comes back to Ayodhyaa and Raam and Lakshman meet their two brothers