Explanation:

Narsinh Mehta
Narsinh Mehta, also known as Narsi Mehta or Narsi Bhagat (1414–1481), was a poet-saint of Gujarat, India, notable as a bhakta, an exponent of Vaishnava poetry. He is especially revered in Gujarati literature, where he is acclaimed as its Adi Kavi (Sanskrit for "first among poets"). His bhajan Vaishnav Jan To was Mahatma Gandhi's favourite and has become synonymous to him.
In Junagadh, Mehta lived in poverty with his wife and two children, a son named Shamaldas, and a daughter for whom he had special affection, Kunwarbai. He revelled in devotion to his heart's content along with sadhus, saints, and all those people who were Lord Hari's subjects – Harijans – irrespective of their caste, class or sex. It also seems that he must have fallen into a somewhat ill repute amongst the Nagars following incidents like accepting invitation to sing glories of Lord Krishna in association of devotees belonging to lower social strata.
The term coined by Narsinh Mehta, Harijan, was popularized by Mahatma Gandhi.