New Delhi, Oct 31 (ANI): Prime Minister Narendra Modi on Friday administered unity pledge on the occasion of 139th birth anniversary of Sardar Vallabhai Patel. Modi administered pledge to thousands of people present to participate in 'Run for Unity' at Rajpath. Modi took pledge for unity in the nation. The government had earlier announced that it would observe the birth anniversary of Patel on October 31 every year as National Unity Day as a tribute to his efforts to unite India.