Urmila was Laxman's wife in the Ramayana. She was the daughter of King Janaka of Mithila and sister of Sita. When Laxman accompanied Lord Ram and Sita to their 14-year exile, Urmila chose to stay back and sleep for 14 years to symbolize her sacrifice - a concept known as 'Urmila Nidra.' In some versions, she slept so Laxman could stay awake to protect Ram and Sita.