Paanch Pandavon mein Bhimsen atyant balshali aur veer the, par unhe bhojan bahut priya tha — bina khaaye ve reh hi nahi paate the. Maata Kunti, Yudhishthir, Arjun, Draupadi aur baaki sab har maas dono Ekadashiyon ka vrat shraddha se rakhte the, par Bhima apni bhookh ke kaaran ek bhi Ekadashi ka upvaas na kar paate the. Isse unke man mein dukh aur glaani rehti thi.
Bhima sochte — "Daan-yagya to kar sakta hoon, par bhookh ke aage upvaas mere bas ki baat nahi. Phir mujhe Ekadashi ka punya kaise milega aur main paap se kaise bachoonga?" Apni yeh vyatha lekar ve apne pitaamah-tulya Maharshi Vedvyaas ke paas gaye aur upaay poocha.
Vyas ji muskuraaye aur bole — "He Bhimsen, yadi tum varsh bhar ki chaubeeson Ekadashiyon ka upvaas nahi kar sakte, to keval ek vrat karo — Jyeshtha maas ke Shukla paksha ki Nirjala Ekadashi. Is din sooryoday se agle din dwadashi tak bina ann aur bina jal (nirjala) rahkar Bhagwan Vishnu ki aaradhana karo. Iske punya se tumhe varsh ki saari Ekadashiyon ka phal ek saath mil jaayega."
Bhima ne yeh atyant kathin vrat sweekar kiya. Bina jal ke poora din-raat upvaas karna unke liye saadhaaran baat na thi — vrat ke ant mein ve murchhit-se ho gaye, par unhone niyam na toda. Is kathin vrat ko poora karne ke kaaran ise Bhimseni Ekadashi bhi kaha jaata hai. Bhagwan Vishnu prasann hue aur Bhima ko chaubeeson Ekadashiyon ka punya prapt hua.
Seekh: Nirjala Ekadashi sikhaati hai ki drid sankalp, sanyam aur shraddha se kiya gaya ek hi vrat sampoorn varsh ke punya ke barabar phal de sakta hai. Yeh varsh ki sabse kathin aur sabse phaldaayi Ekadashi maani jaati hai.