Gurdwara Reetha Sahib is located at a crow fly distance of about 60 km to the North of Gurdwara Nanak Matta, Uttrakhand. The founder of Sikhism, Guru Nanak Dev had visited this place. He had a spiritual discussion with the Gorakhpanthi Jogis(saints), who lived at this place. Guru tried to guide them to serve the mankind along with meditation. When Bhai Mardana asked Guru Nanak for food, the Guru instructed him to request the yogis for the same. Yogis denied the food and asked Bhai Sahib to approach Guru Nanak if he considered that the Guru possessed the true spiritual power. Guru Nanak Dev miraculously changed the normally bitter fruit of a Sapindus emarginatus (Reetha) tree sweet to enable Bhai Mardana to eat it.A Sapindus emarginatus tree (not the original one) is still located at that place. The fruits of this tree are given as Prasad (blessing) to the pilgrims.