This Gurdwara is situated at a distance of 45 Km from Bathinda City and 6 Km Northwest of town Rampura Phul in Village Mehraj. This Gurdwara is near Gurdwara Gurusar Sahib, Mehraj and is also known as Gurdwara Chhota Gurusar, Mehraj.
When Sixth Sikh Guru, Shri Guru Hargobind Sahib Ji came to Village Mehraj in 1634 to fight against Mughal army, he selected this place to reside and put up a camp here. The battle was fought at the place where Gurdwara Gurusar, Mehraj is situated. In the evening Guru Ji used to stay at this place. A community Kitchen was arranged here. Guru Ji stayed here for 3 Months. A person named Phul alongwith his brother Sandali and his Paternal Uncle named Kala, came to Guru Ji. Phul slapped his belly to indicate that he was hungry. Guru Ji rode on his horse alongwith Kala Ji through this area and thus made Kala Ji , the owner of the area. Guru Ji punished a person named Jaid Purana. Guru Ji also blessed Hassan Khan (an informer of Mughal army who was thrown out of the army by commander Lalla Beg for praising Guru Ji) that soon he would be the Subedar of Kabul in place of Lalla Beg.
The Seventh Sikh Guru, Shri Guru Har Rai Ji visited this place during his journey of Malwa region. During Guru Ji's stay, Baba Kala Ji alongwith his nephews Baba Phul Ji and Baba Sandali Ji came to seek Guru Ji's blessings. Guru Ji blessed them by Saying that Baba Kala Ji would become a King of the States if he continues to follow Sikhism. If he or his descendants left the path of Sikhism and indulged in drug addiction, all the Kingdom would be lost. The Phulkian States of Nabha, Patiala and Jind were founded and ruled by the descendants of Baba Phul Ji.