Guru Nanak Dev Ji, the founder of Sikhism, is believed to have attained enlightenment after taking a dip in the Kali Bein. Guru Nanak Dev Ji is said to have disappeared while bathing in the Bein only to reappear three days later. Guru Nanak Dev Ji then proclaimed that “There is no Hindu and there is no Musalman. There is only one God and all are equal before Him”.The Mool Mantra of Sikhism, Ik Onkar, originated from this experience. The Gurudwara Ber Sahib, where Guru Nanak Dev Ji used to meditate under a ber tree, is located on the Kali Bein’s banks in Sultanpur Lodhi.